Mercurial > hg > xemacs-beta
annotate src/eval.c @ 4792:95b04754ea8c
Make #'equalp more compatible with CL; add a compiler macro, test & doc it.
lisp/ChangeLog addition:
2009-11-08 Aidan Kehoe <kehoea@parhasard.net>
* cl-extra.el (cl-string-vector-equalp)
(cl-bit-vector-vector-equalp, cl-vector-array-equalp)
(cl-hash-table-contents-equalp): New functions, to implement
equalp treating arrays with identical contents as equivalent, as
specified by Common Lisp.
(equalp): Revise this function to implement array equivalence,
and the hash-table equalp behaviour specified by CL.
* cl-macs.el (equalp): Add a compiler macro for this function,
used when one of the arguments is constant, and as such, its type
is known at compile time.
man/ChangeLog addition:
2009-11-08 Aidan Kehoe <kehoea@parhasard.net>
* lispref/objects.texi (Equality Predicates):
Document #'equalp here, as well as #'equal and #'eq.
tests/ChangeLog addition:
2009-12-31 Aidan Kehoe <kehoea@parhasard.net>
* automated/lisp-tests.el:
Test much of the functionality of equalp; add a pointer to Paul
Dietz' ANSI test suite for this function, converted to Emacs
Lisp. Not including the tests themselves in XEmacs because who
owns the copyright on the files is unclear and the GCL people
didn't respond to my queries.
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Thu, 31 Dec 2009 15:09:41 +0000 |
| parents | 17f7e9191c0b |
| children | 084056f46755 e0db3c197671 |
| rev | line source |
|---|---|
| 428 | 1 /* Evaluator for XEmacs Lisp interpreter. |
| 2 Copyright (C) 1985-1987, 1992-1994 Free Software Foundation, Inc. | |
| 3 Copyright (C) 1995 Sun Microsystems, Inc. | |
| 2421 | 4 Copyright (C) 2000, 2001, 2002, 2003, 2004 Ben Wing. |
| 428 | 5 |
| 6 This file is part of XEmacs. | |
| 7 | |
| 8 XEmacs is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by the | |
| 10 Free Software Foundation; either version 2, or (at your option) any | |
| 11 later version. | |
| 12 | |
| 13 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 19 along with XEmacs; see the file COPYING. If not, write to | |
| 20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 21 Boston, MA 02111-1307, USA. */ | |
| 22 | |
| 23 /* Synched up with: FSF 19.30 (except for Fsignal), Mule 2.0. */ | |
| 24 | |
| 853 | 25 /* Authorship: |
| 26 | |
| 27 Based on code from pre-release FSF 19, c. 1991. | |
| 28 Some work by Richard Mlynarik long ago (c. 1993?) -- | |
| 29 added call-with-condition-handler; synch. up to released FSF 19.7 | |
| 30 for lemacs 19.8. some signal changes. | |
| 31 Various work by Ben Wing, 1995-1996: | |
| 32 added all stuff dealing with trapping errors, suspended-errors, etc. | |
| 33 added most Fsignal front ends. | |
| 34 added warning code. | |
| 35 reworked the Fsignal code and synched the rest up to FSF 19.30. | |
| 36 Some changes by Martin Buchholz c. 1999? | |
| 37 e.g. PRIMITIVE_FUNCALL macros. | |
| 38 New call_trapping_problems code and large comments below | |
| 39 by Ben Wing, Mar-Apr 2000. | |
| 40 */ | |
| 41 | |
| 42 /* This file has been Mule-ized. */ | |
| 43 | |
| 44 /* What is in this file? | |
| 45 | |
| 46 This file contains the engine for the ELisp interpreter in XEmacs. | |
| 47 The engine does the actual work of implementing function calls, | |
| 48 form evaluation, non-local exits (catch, throw, signal, | |
| 49 condition-case, call-with-condition-handler), unwind-protects, | |
| 50 dynamic bindings, let constructs, backtraces, etc. You might say | |
| 51 that this module is the very heart of XEmacs, and everything else | |
| 52 in XEmacs is merely an auxiliary module implementing some specific | |
| 53 functionality that may be called from the heart at an appropriate | |
| 54 time. | |
| 55 | |
| 56 The only exception is the alloc.c module, which implements the | |
| 57 framework upon which this module (eval.c) works. alloc.c works | |
| 58 with creating the actual Lisp objects themselves and garbage | |
| 1960 | 59 collecting them as necessary, presenting a nice, high-level |
| 853 | 60 interface for object creation, deletion, access, and modification. |
| 61 | |
| 62 The only other exception that could be cited is the event-handling | |
| 63 module in event-stream.c. From its perspective, it is also the | |
| 64 heart of XEmacs, and controls exactly what gets done at what time. | |
| 65 From its perspective, eval.c is merely one of the auxiliary modules | |
| 66 out there that can be invoked by event-stream.c. | |
| 67 | |
| 68 Although the event-stream-centric view is a convenient fiction that | |
| 69 makes sense particularly from the user's perspective and from the | |
| 70 perspective of time, the engine-centric view is actually closest to | |
| 71 the truth, because anywhere within the event-stream module, you are | |
| 72 still somewhere in a Lisp backtrace, and event-loops are begun by | |
| 73 functions such as `command-loop-1', a Lisp function. | |
| 74 | |
| 75 As the Lisp engine is doing its thing, it maintains the state of | |
| 1960 | 76 the engine primarily in five list-like items, which are: |
| 853 | 77 |
| 78 -- the backtrace list | |
| 79 -- the catchtag list | |
| 80 -- the condition-handler list | |
| 81 -- the specbind list | |
| 82 -- the GCPRO list. | |
| 83 | |
| 84 These are described in detail in the next comment. | |
| 85 | |
| 86 --ben | |
| 87 */ | |
| 88 | |
| 89 /* Note that there are five separate lists used to maintain state in | |
| 90 the evaluator. All of them conceptually are stacks (last-in, | |
| 91 first-out). All non-local exits happen ultimately through the | |
| 92 catch/throw mechanism, which uses one of the five lists (the | |
| 93 catchtag list) and records the current state of the others in each | |
| 94 frame of the list (some other information is recorded and restored | |
| 95 as well, such as the current eval depth), so that all the state of | |
| 96 the evaluator is restored properly when a non-local exit occurs. | |
| 97 (Note that the current state of the condition-handler list is not | |
| 98 recorded in the catchtag list. Instead, when a condition-case or | |
| 99 call-with-condition-handler is set up, it installs an | |
| 100 unwind-protect on the specbind list to restore the appropriate | |
| 101 setting for the condition-handler list. During the course of | |
| 102 handling the non-local exit, all entries on the specbind list that | |
| 103 are past the location stored in the catch frame are "unwound" | |
| 104 (i.e. variable bindings are restored and unwind-protects are | |
| 105 executed), so the condition-handler list gets reset properly. | |
| 106 | |
| 107 The five lists are | |
| 108 | |
| 109 1. The backtrace list, which is chained through `struct backtrace's | |
| 110 declared in the stack frames of various primitives, and keeps | |
| 111 track of all Lisp function call entries and exits. | |
| 112 2. The catchtag list, which is chained through `struct catchtag's | |
| 113 declared in the stack frames of internal_catch and condition_case_1, | |
| 114 and keeps track of information needed to reset the internal state | |
| 115 of the evaluator to the state that was current when the catch or | |
| 116 condition-case were established, in the event of a non-local exit. | |
| 117 3. The condition-handler list, which is a simple Lisp list with new | |
| 118 entries consed onto the front of the list. It records condition-cases | |
| 119 and call-with-condition-handlers established either from C or from | |
| 120 Lisp. Unlike with the other lists (but similar to everything else | |
| 121 of a similar nature in the rest of the C and Lisp code), it takes care | |
| 122 of restoring itself appropriately in the event of a non-local exit | |
| 123 through the use of the unwind-protect mechanism. | |
| 124 4. The specbind list, which is a contiguous array of `struct specbinding's, | |
| 125 expanded as necessary using realloc(). It holds dynamic variable | |
| 126 bindings (the only kind we currently have in ELisp) and unwind-protects. | |
| 127 5. The GCPRO list, which is chained through `struct gcpro's declared in | |
| 128 the stack frames of any functions that need to GC-protect Lisp_Objects | |
| 129 declared on the stack. This is one of the most fragile areas of the | |
| 130 entire scheme -- you must not forget to UNGCPRO at the end of your | |
| 131 function, you must make sure you GCPRO in many circumstances you don't | |
| 132 think you have to, etc. See the internals manual for more information | |
| 133 about this. | |
| 134 | |
| 135 --ben | |
| 136 */ | |
| 137 | |
| 428 | 138 #include <config.h> |
| 139 #include "lisp.h" | |
| 140 | |
| 141 #include "commands.h" | |
| 142 #include "backtrace.h" | |
| 143 #include "bytecode.h" | |
| 144 #include "buffer.h" | |
| 872 | 145 #include "console-impl.h" |
| 853 | 146 #include "device.h" |
| 147 #include "frame.h" | |
| 148 #include "lstream.h" | |
| 428 | 149 #include "opaque.h" |
| 1292 | 150 #include "profile.h" |
| 853 | 151 #include "window.h" |
| 428 | 152 |
| 153 struct backtrace *backtrace_list; | |
| 154 | |
| 155 /* Macros for calling subrs with an argument list whose length is only | |
| 156 known at runtime. See EXFUN and DEFUN for similar hackery. */ | |
| 157 | |
| 158 #define AV_0(av) | |
| 159 #define AV_1(av) av[0] | |
| 160 #define AV_2(av) AV_1(av), av[1] | |
| 161 #define AV_3(av) AV_2(av), av[2] | |
| 162 #define AV_4(av) AV_3(av), av[3] | |
| 163 #define AV_5(av) AV_4(av), av[4] | |
| 164 #define AV_6(av) AV_5(av), av[5] | |
| 165 #define AV_7(av) AV_6(av), av[6] | |
| 166 #define AV_8(av) AV_7(av), av[7] | |
| 167 | |
| 168 #define PRIMITIVE_FUNCALL_1(fn, av, ac) \ | |
| 444 | 169 (((Lisp_Object (*)(EXFUN_##ac)) (fn)) (AV_##ac (av))) |
| 428 | 170 |
| 171 /* If subrs take more than 8 arguments, more cases need to be added | |
| 172 to this switch. (But wait - don't do it - if you really need | |
| 173 a SUBR with more than 8 arguments, use max_args == MANY. | |
| 853 | 174 Or better, considering using a property list as one of your args. |
| 428 | 175 See the DEFUN macro in lisp.h) */ |
| 176 #define PRIMITIVE_FUNCALL(rv, fn, av, ac) do { \ | |
| 177 void (*PF_fn)(void) = (void (*)(void)) fn; \ | |
| 178 Lisp_Object *PF_av = (av); \ | |
| 179 switch (ac) \ | |
| 180 { \ | |
| 436 | 181 default:rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 0); break; \ |
| 428 | 182 case 1: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 1); break; \ |
| 183 case 2: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 2); break; \ | |
| 184 case 3: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 3); break; \ | |
| 185 case 4: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 4); break; \ | |
| 186 case 5: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 5); break; \ | |
| 187 case 6: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 6); break; \ | |
| 188 case 7: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 7); break; \ | |
| 189 case 8: rv = PRIMITIVE_FUNCALL_1(PF_fn, PF_av, 8); break; \ | |
| 190 } \ | |
| 191 } while (0) | |
| 192 | |
| 193 #define FUNCALL_SUBR(rv, subr, av, ac) \ | |
| 194 PRIMITIVE_FUNCALL (rv, subr_function (subr), av, ac); | |
| 195 | |
| 196 | |
| 197 /* This is the list of current catches (and also condition-cases). | |
| 853 | 198 This is a stack: the most recent catch is at the head of the list. |
| 199 The list is threaded through the stack frames of the C functions | |
| 200 that set up the catches; this is similar to the way the GCPRO list | |
| 201 is handled, but different from the condition-handler list (which is | |
| 202 a simple Lisp list) and the specbind stack, which is a contiguous | |
| 203 array of `struct specbinding's, grown (using realloc()) as | |
| 204 necessary. (Note that all four of these lists behave as a stacks.) | |
| 205 | |
| 3025 | 206 Catches are created by declaring a `struct catchtag' locally, |
| 853 | 207 filling the .TAG field in with the tag, and doing a setjmp() on |
| 208 .JMP. Fthrow() will store the value passed to it in .VAL and | |
| 209 longjmp() back to .JMP, back to the function that established the | |
| 210 catch. This will always be either internal_catch() (catches | |
| 211 established internally or through `catch') or condition_case_1 | |
| 212 (condition-cases established internally or through | |
| 213 `condition-case'). | |
| 428 | 214 |
| 215 The catchtag also records the current position in the | |
| 216 call stack (stored in BACKTRACE_LIST), the current position | |
| 217 in the specpdl stack (used for variable bindings and | |
| 218 unwind-protects), the value of LISP_EVAL_DEPTH, and the | |
| 219 current position in the GCPRO stack. All of these are | |
| 220 restored by Fthrow(). | |
| 853 | 221 */ |
| 428 | 222 |
| 223 struct catchtag *catchlist; | |
| 224 | |
| 853 | 225 /* A special tag that can be used internally from C code to catch |
| 226 every attempt to throw past this level. */ | |
| 227 Lisp_Object Vcatch_everything_tag; | |
| 228 | |
| 428 | 229 Lisp_Object Qautoload, Qmacro, Qexit; |
| 230 Lisp_Object Qinteractive, Qcommandp, Qdefun, Qprogn, Qvalues; | |
| 231 Lisp_Object Vquit_flag, Vinhibit_quit; | |
| 232 Lisp_Object Qand_rest, Qand_optional; | |
| 233 Lisp_Object Qdebug_on_error, Qstack_trace_on_error; | |
| 234 Lisp_Object Qdebug_on_signal, Qstack_trace_on_signal; | |
| 235 Lisp_Object Qdebugger; | |
| 236 Lisp_Object Qinhibit_quit; | |
| 887 | 237 Lisp_Object Qfinalize_list; |
| 428 | 238 Lisp_Object Qrun_hooks; |
| 239 Lisp_Object Qsetq; | |
| 240 Lisp_Object Qdisplay_warning; | |
| 241 Lisp_Object Vpending_warnings, Vpending_warnings_tail; | |
| 242 Lisp_Object Qif; | |
| 243 | |
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244 Lisp_Object Qthrow; |
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245 Lisp_Object Qobsolete_throw; |
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246 Lisp_Object Qmultiple_value_list_internal; |
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247 |
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248 static int first_desired_multiple_value; |
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249 /* Used outside this file, somewhat uncleanly, in the IGNORE_MULTIPLE_VALUES |
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250 macro: */ |
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251 int multiple_value_current_limit; |
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252 |
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253 Fixnum Vmultiple_values_limit; |
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254 |
| 853 | 255 /* Flags specifying which operations are currently inhibited. */ |
| 256 int inhibit_flags; | |
| 257 | |
| 258 /* Buffers, frames, windows, devices, and consoles created since most | |
| 259 recent active | |
| 260 call_trapping_problems (INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION). | |
| 261 */ | |
| 262 Lisp_Object Vdeletable_permanent_display_objects; | |
| 263 | |
| 264 /* Buffers created since most recent active | |
| 265 call_trapping_problems (INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION). */ | |
| 266 Lisp_Object Vmodifiable_buffers; | |
| 793 | 267 |
| 268 /* Minimum level at which warnings are logged. Below this, they're ignored | |
| 269 entirely -- not even generated. */ | |
| 270 Lisp_Object Vlog_warning_minimum_level; | |
| 271 | |
| 428 | 272 /* Non-nil means record all fset's and provide's, to be undone |
| 273 if the file being autoloaded is not fully loaded. | |
| 274 They are recorded by being consed onto the front of Vautoload_queue: | |
| 275 (FUN . ODEF) for a defun, (OFEATURES . nil) for a provide. */ | |
| 276 Lisp_Object Vautoload_queue; | |
| 277 | |
| 278 /* Current number of specbindings allocated in specpdl. */ | |
| 279 int specpdl_size; | |
| 280 | |
| 281 /* Pointer to beginning of specpdl. */ | |
| 282 struct specbinding *specpdl; | |
| 283 | |
| 284 /* Pointer to first unused element in specpdl. */ | |
| 285 struct specbinding *specpdl_ptr; | |
| 286 | |
| 287 /* specpdl_ptr - specpdl */ | |
| 288 int specpdl_depth_counter; | |
| 289 | |
| 290 /* Maximum size allowed for specpdl allocation */ | |
| 458 | 291 Fixnum max_specpdl_size; |
| 428 | 292 |
| 293 /* Depth in Lisp evaluations and function calls. */ | |
| 1292 | 294 int lisp_eval_depth; |
| 428 | 295 |
| 296 /* Maximum allowed depth in Lisp evaluations and function calls. */ | |
| 458 | 297 Fixnum max_lisp_eval_depth; |
| 428 | 298 |
| 299 /* Nonzero means enter debugger before next function call */ | |
| 300 static int debug_on_next_call; | |
| 301 | |
| 1292 | 302 int backtrace_with_internal_sections; |
| 303 | |
| 428 | 304 /* List of conditions (non-nil atom means all) which cause a backtrace |
| 305 if an error is handled by the command loop's error handler. */ | |
| 306 Lisp_Object Vstack_trace_on_error; | |
| 307 | |
| 308 /* List of conditions (non-nil atom means all) which enter the debugger | |
| 309 if an error is handled by the command loop's error handler. */ | |
| 310 Lisp_Object Vdebug_on_error; | |
| 311 | |
| 312 /* List of conditions and regexps specifying error messages which | |
| 313 do not enter the debugger even if Vdebug_on_error says they should. */ | |
| 314 Lisp_Object Vdebug_ignored_errors; | |
| 315 | |
| 316 /* List of conditions (non-nil atom means all) which cause a backtrace | |
| 317 if any error is signalled. */ | |
| 318 Lisp_Object Vstack_trace_on_signal; | |
| 319 | |
| 320 /* List of conditions (non-nil atom means all) which enter the debugger | |
| 321 if any error is signalled. */ | |
| 322 Lisp_Object Vdebug_on_signal; | |
| 323 | |
| 324 /* Nonzero means enter debugger if a quit signal | |
| 325 is handled by the command loop's error handler. | |
| 326 | |
| 327 From lisp, this is a boolean variable and may have the values 0 and 1. | |
| 328 But, eval.c temporarily uses the second bit of this variable to indicate | |
| 329 that a critical_quit is in progress. The second bit is reset immediately | |
| 330 after it is processed in signal_call_debugger(). */ | |
| 331 int debug_on_quit; | |
| 332 | |
| 333 #if 0 /* FSFmacs */ | |
| 334 /* entering_debugger is basically equivalent */ | |
| 335 /* The value of num_nonmacro_input_chars as of the last time we | |
| 336 started to enter the debugger. If we decide to enter the debugger | |
| 337 again when this is still equal to num_nonmacro_input_chars, then we | |
| 338 know that the debugger itself has an error, and we should just | |
| 339 signal the error instead of entering an infinite loop of debugger | |
| 340 invocations. */ | |
| 341 int when_entered_debugger; | |
| 342 #endif | |
| 343 | |
| 344 /* Nonzero means we are trying to enter the debugger. | |
| 345 This is to prevent recursive attempts. | |
| 346 Cleared by the debugger calling Fbacktrace */ | |
| 347 static int entering_debugger; | |
| 348 | |
| 349 /* Function to call to invoke the debugger */ | |
| 350 Lisp_Object Vdebugger; | |
| 351 | |
| 853 | 352 /* List of condition handlers currently in effect. |
| 353 The elements of this lists were at one point in the past | |
| 354 threaded through the stack frames of Fcondition_case and | |
| 355 related functions, but now are stored separately in a normal | |
| 356 stack. When an error is signaled (by calling Fsignal, below), | |
| 357 this list is searched for an element that applies. | |
| 428 | 358 |
| 359 Each element of this list is one of the following: | |
| 360 | |
| 853 | 361 -- A list of a handler function and possibly args to pass to the |
| 362 function. This is a handler established with the Lisp primitive | |
| 363 `call-with-condition-handler' or related C function | |
| 364 call_with_condition_handler(): | |
| 365 | |
| 366 If the handler function is an opaque ptr object, it is a handler | |
| 367 that was established in C using call_with_condition_handler(), | |
| 368 and the contents of the object are a function pointer which takes | |
| 369 three arguments, the signal name and signal data (same arguments | |
| 370 passed to `signal') and a third Lisp_Object argument, specified | |
| 371 in the call to call_with_condition_handler() and stored as the | |
| 372 second element of the list containing the handler functionl. | |
| 373 | |
| 374 If the handler function is a regular Lisp_Object, it is a handler | |
| 375 that was established using `call-with-condition-handler'. | |
| 376 Currently there are no more arguments in the list containing the | |
| 377 handler function, and only one argument is passed to the handler | |
| 378 function: a cons of the signal name and signal data arguments | |
| 379 passed to `signal'. | |
| 380 | |
| 381 -- A list whose car is Qunbound and whose cdr is Qt. This is a | |
| 382 special condition-case handler established by C code with | |
| 383 condition_case_1(). All errors are trapped; the debugger is not | |
| 384 invoked even if `debug-on-error' was set. | |
| 385 | |
| 386 -- A list whose car is Qunbound and whose cdr is Qerror. This is a | |
| 387 special condition-case handler established by C code with | |
| 388 condition_case_1(). It is like Qt except that the debugger is | |
| 389 invoked normally if it is called for. | |
| 390 | |
| 391 -- A list whose car is Qunbound and whose cdr is a list of lists | |
| 392 (CONDITION-NAME BODY ...) exactly as in `condition-case'. This is | |
| 393 a normal `condition-case' handler. | |
| 394 | |
| 395 Note that in all cases *except* the first, there is a corresponding | |
| 396 catch, whose TAG is the value of Vcondition_handlers just after the | |
| 397 handler data just described is pushed onto it. The reason is that | |
| 398 `condition-case' handlers need to throw back to the place where the | |
| 399 handler was installed before invoking it, while | |
| 400 `call-with-condition-handler' handlers are invoked in the | |
| 401 environment that `signal' was invoked in. */ | |
| 402 | |
| 403 | |
| 428 | 404 static Lisp_Object Vcondition_handlers; |
| 405 | |
| 853 | 406 /* I think we should keep this enabled all the time, not just when |
| 407 error checking is enabled, because if one of these puppies pops up, | |
| 408 it will trash the stack if not caught, making it that much harder to | |
| 409 debug. It doesn't cause speed loss. */ | |
| 442 | 410 #define DEFEND_AGAINST_THROW_RECURSION |
| 411 | |
| 412 #ifdef DEFEND_AGAINST_THROW_RECURSION | |
| 428 | 413 /* Used for error catching purposes by throw_or_bomb_out */ |
| 414 static int throw_level; | |
| 442 | 415 #endif |
| 416 | |
| 1123 | 417 static int warning_will_be_discarded (Lisp_Object level); |
| 2532 | 418 static Lisp_Object maybe_get_trapping_problems_backtrace (void); |
| 1123 | 419 |
| 428 | 420 |
| 421 /************************************************************************/ | |
| 422 /* The subr object type */ | |
| 423 /************************************************************************/ | |
| 424 | |
| 425 static void | |
| 2286 | 426 print_subr (Lisp_Object obj, Lisp_Object printcharfun, int UNUSED (escapeflag)) |
| 428 | 427 { |
| 428 Lisp_Subr *subr = XSUBR (obj); | |
| 867 | 429 const CIbyte *header = |
| 428 | 430 (subr->max_args == UNEVALLED) ? "#<special-form " : "#<subr "; |
| 867 | 431 const CIbyte *name = subr_name (subr); |
| 432 const CIbyte *trailer = subr->prompt ? " (interactive)>" : ">"; | |
| 428 | 433 |
| 434 if (print_readably) | |
| 563 | 435 printing_unreadable_object ("%s%s%s", header, name, trailer); |
| 428 | 436 |
| 826 | 437 write_c_string (printcharfun, header); |
| 438 write_c_string (printcharfun, name); | |
| 439 write_c_string (printcharfun, trailer); | |
| 428 | 440 } |
| 441 | |
| 1204 | 442 static const struct memory_description subr_description[] = { |
| 2551 | 443 { XD_DOC_STRING, offsetof (Lisp_Subr, doc), 0, { 0 }, XD_FLAG_NO_KKCC }, |
| 428 | 444 { XD_END } |
| 445 }; | |
| 446 | |
| 938 | 447 DEFINE_BASIC_LRECORD_IMPLEMENTATION ("subr", subr, |
| 448 1, /*dumpable-flag*/ | |
| 449 0, print_subr, 0, 0, 0, | |
| 450 subr_description, | |
| 451 Lisp_Subr); | |
| 428 | 452 |
| 453 /************************************************************************/ | |
| 454 /* Entering the debugger */ | |
| 455 /************************************************************************/ | |
| 456 | |
| 853 | 457 static Lisp_Object |
| 458 current_warning_level (void) | |
| 459 { | |
| 460 if (inhibit_flags & ISSUE_WARNINGS_AT_DEBUG_LEVEL) | |
| 461 return Qdebug; | |
| 462 else | |
| 463 return Qwarning; | |
| 464 } | |
| 465 | |
| 428 | 466 /* Actually call the debugger. ARG is a list of args that will be |
| 467 passed to the debugger function, as follows; | |
| 468 | |
| 469 If due to frame exit, args are `exit' and the value being returned; | |
| 470 this function's value will be returned instead of that. | |
| 471 If due to error, args are `error' and a list of the args to `signal'. | |
| 472 If due to `apply' or `funcall' entry, one arg, `lambda'. | |
| 473 If due to `eval' entry, one arg, t. | |
| 474 | |
| 475 */ | |
| 476 | |
| 477 static Lisp_Object | |
| 478 call_debugger_259 (Lisp_Object arg) | |
| 479 { | |
| 480 return apply1 (Vdebugger, arg); | |
| 481 } | |
| 482 | |
| 483 /* Call the debugger, doing some encapsulation. We make sure we have | |
| 484 some room on the eval and specpdl stacks, and bind entering_debugger | |
| 485 to 1 during this call. This is used to trap errors that may occur | |
| 486 when entering the debugger (e.g. the value of `debugger' is invalid), | |
| 487 so that the debugger will not be recursively entered if debug-on-error | |
| 488 is set. (Otherwise, XEmacs would infinitely recurse, attempting to | |
| 489 enter the debugger.) entering_debugger gets reset to 0 as soon | |
| 490 as a backtrace is displayed, so that further errors can indeed be | |
| 491 handled normally. | |
| 492 | |
| 3025 | 493 We also establish a catch for `debugger'. If the debugger function |
| 428 | 494 throws to this instead of returning a value, it means that the user |
| 495 pressed 'c' (pretend like the debugger was never entered). The | |
| 496 function then returns Qunbound. (If the user pressed 'r', for | |
| 497 return a value, then the debugger function returns normally with | |
| 498 this value.) | |
| 499 | |
| 500 The difference between 'c' and 'r' is as follows: | |
| 501 | |
| 502 debug-on-call: | |
| 503 No difference. The call proceeds as normal. | |
| 504 debug-on-exit: | |
| 505 With 'r', the specified value is returned as the function's | |
| 506 return value. With 'c', the value that would normally be | |
| 507 returned is returned. | |
| 508 signal: | |
| 509 With 'r', the specified value is returned as the return | |
| 510 value of `signal'. (This is the only time that `signal' | |
| 511 can return, instead of making a non-local exit.) With `c', | |
| 512 `signal' will continue looking for handlers as if the | |
| 513 debugger was never entered, and will probably end up | |
| 514 throwing to a handler or to top-level. | |
| 515 */ | |
| 516 | |
| 517 static Lisp_Object | |
| 518 call_debugger (Lisp_Object arg) | |
| 519 { | |
| 520 int threw; | |
| 521 Lisp_Object val; | |
| 522 int speccount; | |
| 523 | |
| 853 | 524 debug_on_next_call = 0; |
| 525 | |
| 526 if (inhibit_flags & INHIBIT_ENTERING_DEBUGGER) | |
| 527 { | |
| 528 if (!(inhibit_flags & INHIBIT_WARNING_ISSUE)) | |
| 529 warn_when_safe | |
| 530 (Qdebugger, current_warning_level (), | |
| 531 "Unable to enter debugger within critical section"); | |
| 532 return Qunbound; | |
| 533 } | |
| 534 | |
| 428 | 535 if (lisp_eval_depth + 20 > max_lisp_eval_depth) |
| 536 max_lisp_eval_depth = lisp_eval_depth + 20; | |
| 537 if (specpdl_size + 40 > max_specpdl_size) | |
| 538 max_specpdl_size = specpdl_size + 40; | |
| 853 | 539 |
| 540 speccount = internal_bind_int (&entering_debugger, 1); | |
| 2532 | 541 val = internal_catch (Qdebugger, call_debugger_259, arg, &threw, 0, 0); |
| 428 | 542 |
| 771 | 543 return unbind_to_1 (speccount, ((threw) |
| 428 | 544 ? Qunbound /* Not returning a value */ |
| 545 : val)); | |
| 546 } | |
| 547 | |
| 548 /* Called when debug-on-exit behavior is called for. Enter the debugger | |
| 549 with the appropriate args for this. VAL is the exit value that is | |
| 550 about to be returned. */ | |
| 551 | |
| 552 static Lisp_Object | |
| 553 do_debug_on_exit (Lisp_Object val) | |
| 554 { | |
| 555 /* This is falsified by call_debugger */ | |
| 556 Lisp_Object v = call_debugger (list2 (Qexit, val)); | |
| 557 | |
| 558 return !UNBOUNDP (v) ? v : val; | |
| 559 } | |
| 560 | |
| 561 /* Called when debug-on-call behavior is called for. Enter the debugger | |
| 562 with the appropriate args for this. VAL is either t for a call | |
| 3025 | 563 through `eval' or `lambda' for a call through `funcall'. |
| 428 | 564 |
| 565 #### The differentiation here between EVAL and FUNCALL is bogus. | |
| 566 FUNCALL can be defined as | |
| 567 | |
| 568 (defmacro func (fun &rest args) | |
| 569 (cons (eval fun) args)) | |
| 570 | |
| 571 and should be treated as such. | |
| 572 */ | |
| 573 | |
| 574 static void | |
| 575 do_debug_on_call (Lisp_Object code) | |
| 576 { | |
| 577 debug_on_next_call = 0; | |
| 578 backtrace_list->debug_on_exit = 1; | |
| 579 call_debugger (list1 (code)); | |
| 580 } | |
| 581 | |
| 582 /* LIST is the value of one of the variables `debug-on-error', | |
| 583 `debug-on-signal', `stack-trace-on-error', or `stack-trace-on-signal', | |
| 584 and CONDITIONS is the list of error conditions associated with | |
| 585 the error being signalled. This returns non-nil if LIST | |
| 586 matches CONDITIONS. (A nil value for LIST does not match | |
| 587 CONDITIONS. A non-list value for LIST does match CONDITIONS. | |
| 588 A list matches CONDITIONS when one of the symbols in LIST is the | |
| 589 same as one of the symbols in CONDITIONS.) */ | |
| 590 | |
| 591 static int | |
| 592 wants_debugger (Lisp_Object list, Lisp_Object conditions) | |
| 593 { | |
| 594 if (NILP (list)) | |
| 595 return 0; | |
| 596 if (! CONSP (list)) | |
| 597 return 1; | |
| 598 | |
| 599 while (CONSP (conditions)) | |
| 600 { | |
| 2552 | 601 Lisp_Object curr, tail; |
| 602 curr = XCAR (conditions); | |
| 428 | 603 for (tail = list; CONSP (tail); tail = XCDR (tail)) |
| 2552 | 604 if (EQ (XCAR (tail), curr)) |
| 428 | 605 return 1; |
| 606 conditions = XCDR (conditions); | |
| 607 } | |
| 608 return 0; | |
| 609 } | |
| 610 | |
| 611 | |
| 612 /* Return 1 if an error with condition-symbols CONDITIONS, | |
| 613 and described by SIGNAL-DATA, should skip the debugger | |
|
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614 according to debug-ignored-errors. */ |
| 428 | 615 |
| 616 static int | |
| 617 skip_debugger (Lisp_Object conditions, Lisp_Object data) | |
| 618 { | |
| 619 /* This function can GC */ | |
| 620 Lisp_Object tail; | |
| 621 int first_string = 1; | |
| 622 Lisp_Object error_message = Qnil; | |
| 623 | |
| 624 for (tail = Vdebug_ignored_errors; CONSP (tail); tail = XCDR (tail)) | |
| 625 { | |
| 626 if (STRINGP (XCAR (tail))) | |
| 627 { | |
| 628 if (first_string) | |
| 629 { | |
| 630 error_message = Ferror_message_string (data); | |
| 631 first_string = 0; | |
| 632 } | |
| 633 if (fast_lisp_string_match (XCAR (tail), error_message) >= 0) | |
| 634 return 1; | |
| 635 } | |
| 636 else | |
| 637 { | |
| 638 Lisp_Object contail; | |
| 639 | |
| 640 for (contail = conditions; CONSP (contail); contail = XCDR (contail)) | |
| 641 if (EQ (XCAR (tail), XCAR (contail))) | |
| 642 return 1; | |
| 643 } | |
| 644 } | |
| 645 | |
| 646 return 0; | |
| 647 } | |
| 648 | |
| 649 /* Actually generate a backtrace on STREAM. */ | |
| 650 | |
| 651 static Lisp_Object | |
| 652 backtrace_259 (Lisp_Object stream) | |
| 653 { | |
| 654 return Fbacktrace (stream, Qt); | |
| 655 } | |
| 656 | |
| 1130 | 657 #ifdef DEBUG_XEMACS |
| 658 | |
| 659 static void | |
| 660 trace_out_and_die (Lisp_Object err) | |
| 661 { | |
| 662 Fdisplay_error (err, Qt); | |
| 663 backtrace_259 (Qnil); | |
| 664 stderr_out ("XEmacs exiting to debugger.\n"); | |
| 665 Fforce_debugging_signal (Qt); | |
| 666 /* Unlikely to be reached */ | |
| 667 } | |
| 668 | |
| 669 #endif | |
| 670 | |
| 428 | 671 /* An error was signaled. Maybe call the debugger, if the `debug-on-error' |
| 672 etc. variables call for this. CONDITIONS is the list of conditions | |
| 673 associated with the error being signalled. SIG is the actual error | |
| 674 being signalled, and DATA is the associated data (these are exactly | |
| 675 the same as the arguments to `signal'). ACTIVE_HANDLERS is the | |
| 676 list of error handlers that are to be put in place while the debugger | |
| 677 is called. This is generally the remaining handlers that are | |
| 678 outside of the innermost handler trapping this error. This way, | |
| 679 if the same error occurs inside of the debugger, you usually don't get | |
| 680 the debugger entered recursively. | |
| 681 | |
| 682 This function returns Qunbound if it didn't call the debugger or if | |
| 683 the user asked (through 'c') that XEmacs should pretend like the | |
| 684 debugger was never entered. Otherwise, it returns the value | |
| 685 that the user specified with `r'. (Note that much of the time, | |
| 686 the user will abort with C-], and we will never have a chance to | |
| 687 return anything at all.) | |
| 688 | |
| 689 SIGNAL_VARS_ONLY means we should only look at debug-on-signal | |
| 690 and stack-trace-on-signal to control whether we do anything. | |
| 691 This is so that debug-on-error doesn't make handled errors | |
| 692 cause the debugger to get invoked. | |
| 693 | |
| 694 STACK_TRACE_DISPLAYED and DEBUGGER_ENTERED are used so that | |
| 695 those functions aren't done more than once in a single `signal' | |
| 696 session. */ | |
| 697 | |
| 698 static Lisp_Object | |
| 699 signal_call_debugger (Lisp_Object conditions, | |
| 700 Lisp_Object sig, Lisp_Object data, | |
| 701 Lisp_Object active_handlers, | |
| 702 int signal_vars_only, | |
| 703 int *stack_trace_displayed, | |
| 704 int *debugger_entered) | |
| 705 { | |
| 853 | 706 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE |
| 428 | 707 /* This function can GC */ |
| 853 | 708 #else /* reality check */ |
| 709 /* This function cannot GC because it inhibits GC during its operation */ | |
| 710 #endif | |
| 711 | |
| 428 | 712 Lisp_Object val = Qunbound; |
| 713 Lisp_Object all_handlers = Vcondition_handlers; | |
| 714 Lisp_Object temp_data = Qnil; | |
| 853 | 715 int outer_speccount = specpdl_depth(); |
| 716 int speccount; | |
| 717 | |
| 718 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE | |
| 428 | 719 struct gcpro gcpro1, gcpro2; |
| 720 GCPRO2 (all_handlers, temp_data); | |
| 853 | 721 #else |
| 722 begin_gc_forbidden (); | |
| 723 #endif | |
| 724 | |
| 725 speccount = specpdl_depth(); | |
| 428 | 726 |
| 727 Vcondition_handlers = active_handlers; | |
| 728 | |
| 729 temp_data = Fcons (sig, data); /* needed for skip_debugger */ | |
| 730 | |
| 731 if (!entering_debugger && !*stack_trace_displayed && !signal_vars_only | |
| 732 && wants_debugger (Vstack_trace_on_error, conditions) | |
| 733 && !skip_debugger (conditions, temp_data)) | |
| 734 { | |
| 735 specbind (Qdebug_on_error, Qnil); | |
| 736 specbind (Qstack_trace_on_error, Qnil); | |
| 737 specbind (Qdebug_on_signal, Qnil); | |
| 738 specbind (Qstack_trace_on_signal, Qnil); | |
| 739 | |
| 442 | 740 if (!noninteractive) |
| 741 internal_with_output_to_temp_buffer (build_string ("*Backtrace*"), | |
| 742 backtrace_259, | |
| 743 Qnil, | |
| 744 Qnil); | |
| 745 else /* in batch mode, we want this going to stderr. */ | |
| 746 backtrace_259 (Qnil); | |
| 771 | 747 unbind_to (speccount); |
| 428 | 748 *stack_trace_displayed = 1; |
| 749 } | |
| 750 | |
| 751 if (!entering_debugger && !*debugger_entered && !signal_vars_only | |
| 752 && (EQ (sig, Qquit) | |
| 753 ? debug_on_quit | |
| 754 : wants_debugger (Vdebug_on_error, conditions)) | |
| 755 && !skip_debugger (conditions, temp_data)) | |
| 756 { | |
| 757 debug_on_quit &= ~2; /* reset critical bit */ | |
| 1123 | 758 |
| 428 | 759 specbind (Qdebug_on_error, Qnil); |
| 760 specbind (Qstack_trace_on_error, Qnil); | |
| 761 specbind (Qdebug_on_signal, Qnil); | |
| 762 specbind (Qstack_trace_on_signal, Qnil); | |
| 763 | |
| 1130 | 764 #ifdef DEBUG_XEMACS |
| 765 if (noninteractive) | |
| 766 trace_out_and_die (Fcons (sig, data)); | |
| 767 #endif | |
| 768 | |
| 428 | 769 val = call_debugger (list2 (Qerror, (Fcons (sig, data)))); |
| 853 | 770 unbind_to (speccount); |
| 428 | 771 *debugger_entered = 1; |
| 772 } | |
| 773 | |
| 774 if (!entering_debugger && !*stack_trace_displayed | |
| 775 && wants_debugger (Vstack_trace_on_signal, conditions)) | |
| 776 { | |
| 777 specbind (Qdebug_on_error, Qnil); | |
| 778 specbind (Qstack_trace_on_error, Qnil); | |
| 779 specbind (Qdebug_on_signal, Qnil); | |
| 780 specbind (Qstack_trace_on_signal, Qnil); | |
| 781 | |
| 442 | 782 if (!noninteractive) |
| 783 internal_with_output_to_temp_buffer (build_string ("*Backtrace*"), | |
| 784 backtrace_259, | |
| 785 Qnil, | |
| 786 Qnil); | |
| 787 else /* in batch mode, we want this going to stderr. */ | |
| 788 backtrace_259 (Qnil); | |
| 771 | 789 unbind_to (speccount); |
| 428 | 790 *stack_trace_displayed = 1; |
| 791 } | |
| 792 | |
| 793 if (!entering_debugger && !*debugger_entered | |
| 794 && (EQ (sig, Qquit) | |
| 795 ? debug_on_quit | |
| 796 : wants_debugger (Vdebug_on_signal, conditions))) | |
| 797 { | |
| 798 debug_on_quit &= ~2; /* reset critical bit */ | |
| 1123 | 799 |
| 428 | 800 specbind (Qdebug_on_error, Qnil); |
| 801 specbind (Qstack_trace_on_error, Qnil); | |
| 802 specbind (Qdebug_on_signal, Qnil); | |
| 803 specbind (Qstack_trace_on_signal, Qnil); | |
| 804 | |
| 1130 | 805 #ifdef DEBUG_XEMACS |
| 806 if (noninteractive) | |
| 807 trace_out_and_die (Fcons (sig, data)); | |
| 808 #endif | |
| 809 | |
| 428 | 810 val = call_debugger (list2 (Qerror, (Fcons (sig, data)))); |
| 811 *debugger_entered = 1; | |
| 812 } | |
| 813 | |
| 853 | 814 #ifdef PIGS_FLY_AND_ALL_C_CODE_CAN_HANDLE_GC_OCCURRING_ALMOST_ANYWHERE |
| 428 | 815 UNGCPRO; |
| 853 | 816 #endif |
| 428 | 817 Vcondition_handlers = all_handlers; |
| 853 | 818 return unbind_to_1 (outer_speccount, val); |
| 428 | 819 } |
| 820 | |
| 821 | |
| 822 /************************************************************************/ | |
| 823 /* The basic special forms */ | |
| 824 /************************************************************************/ | |
| 825 | |
| 826 /* Except for Fprogn(), the basic special forms below are only called | |
| 827 from interpreted code. The byte compiler turns them into bytecodes. */ | |
| 828 | |
| 829 DEFUN ("or", For, 0, UNEVALLED, 0, /* | |
|
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830 Eval ARGS until one of them yields non-nil, then return that value. |
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831 The remaining ARGS are not evalled at all. |
| 428 | 832 If all args return nil, return nil. |
|
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833 |
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parents:
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diff
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|
834 Any multiple values from the last form, and only from the last form, are |
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835 passed back. See `values' and `multiple-value-bind'. |
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836 |
|
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837 arguments: (&rest ARGS) |
| 428 | 838 */ |
| 839 (args)) | |
| 840 { | |
| 841 /* This function can GC */ | |
|
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842 Lisp_Object val = Qnil; |
| 428 | 843 |
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844 LIST_LOOP_3 (arg, args, tail) |
| 428 | 845 { |
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846 if (!NILP (IGNORE_MULTIPLE_VALUES (val = Feval (arg)))) |
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parents:
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847 { |
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|
848 if (NILP (XCDR (tail))) |
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849 { |
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850 /* Pass back multiple values if this is the last one: */ |
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851 return val; |
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852 } |
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853 |
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854 return IGNORE_MULTIPLE_VALUES (val); |
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855 } |
| 428 | 856 } |
| 857 | |
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858 return val; |
| 428 | 859 } |
| 860 | |
| 861 DEFUN ("and", Fand, 0, UNEVALLED, 0, /* | |
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862 Eval ARGS until one of them yields nil, then return nil. |
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863 The remaining ARGS are not evalled at all. |
| 428 | 864 If no arg yields nil, return the last arg's value. |
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865 |
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866 Any multiple values from the last form, and only from the last form, are |
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867 passed back. See `values' and `multiple-value-bind'. |
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868 |
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869 arguments: (&rest ARGS) |
| 428 | 870 */ |
| 871 (args)) | |
| 872 { | |
| 873 /* This function can GC */ | |
|
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874 Lisp_Object val = Qt; |
| 428 | 875 |
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876 LIST_LOOP_3 (arg, args, tail) |
| 428 | 877 { |
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878 if (NILP (IGNORE_MULTIPLE_VALUES (val = Feval (arg)))) |
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879 { |
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880 if (NILP (XCDR (tail))) |
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881 { |
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882 /* Pass back any multiple values for the last form: */ |
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883 return val; |
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884 } |
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885 |
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886 return Qnil; |
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887 } |
| 428 | 888 } |
| 889 | |
| 890 return val; | |
| 891 } | |
| 892 | |
| 893 DEFUN ("if", Fif, 2, UNEVALLED, 0, /* | |
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894 If COND yields non-nil, do THEN, else do ELSE. |
| 428 | 895 Returns the value of THEN or the value of the last of the ELSE's. |
| 896 THEN must be one expression, but ELSE... can be zero or more expressions. | |
| 897 If COND yields nil, and there are no ELSE's, the value is nil. | |
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898 |
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899 arguments: (COND THEN &rest ELSE) |
| 428 | 900 */ |
| 901 (args)) | |
| 902 { | |
| 903 /* This function can GC */ | |
| 904 Lisp_Object condition = XCAR (args); | |
| 905 Lisp_Object then_form = XCAR (XCDR (args)); | |
| 906 Lisp_Object else_forms = XCDR (XCDR (args)); | |
| 907 | |
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908 if (!NILP (IGNORE_MULTIPLE_VALUES (Feval (condition)))) |
| 428 | 909 return Feval (then_form); |
| 910 else | |
| 911 return Fprogn (else_forms); | |
| 912 } | |
| 913 | |
| 914 /* Macros `when' and `unless' are trivially defined in Lisp, | |
| 915 but it helps for bootstrapping to have them ALWAYS defined. */ | |
| 916 | |
| 917 DEFUN ("when", Fwhen, 1, MANY, 0, /* | |
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918 If COND yields non-nil, do BODY, else return nil. |
| 428 | 919 BODY can be zero or more expressions. If BODY is nil, return nil. |
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920 |
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921 arguments: (COND &rest BODY) |
| 428 | 922 */ |
| 923 (int nargs, Lisp_Object *args)) | |
| 924 { | |
| 925 Lisp_Object cond = args[0]; | |
| 926 Lisp_Object body; | |
| 853 | 927 |
| 428 | 928 switch (nargs) |
| 929 { | |
| 930 case 1: body = Qnil; break; | |
| 931 case 2: body = args[1]; break; | |
| 932 default: body = Fcons (Qprogn, Flist (nargs-1, args+1)); break; | |
| 933 } | |
| 934 | |
| 935 return list3 (Qif, cond, body); | |
| 936 } | |
| 937 | |
| 938 DEFUN ("unless", Funless, 1, MANY, 0, /* | |
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939 If COND yields nil, do BODY, else return nil. |
| 428 | 940 BODY can be zero or more expressions. If BODY is nil, return nil. |
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941 |
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942 arguments: (COND &rest BODY) |
| 428 | 943 */ |
| 944 (int nargs, Lisp_Object *args)) | |
| 945 { | |
| 946 Lisp_Object cond = args[0]; | |
| 947 Lisp_Object body = Flist (nargs-1, args+1); | |
| 948 return Fcons (Qif, Fcons (cond, Fcons (Qnil, body))); | |
| 949 } | |
| 950 | |
| 951 DEFUN ("cond", Fcond, 0, UNEVALLED, 0, /* | |
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952 Try each clause until one succeeds. |
| 428 | 953 Each clause looks like (CONDITION BODY...). CONDITION is evaluated |
| 954 and, if the value is non-nil, this clause succeeds: | |
| 955 then the expressions in BODY are evaluated and the last one's | |
| 956 value is the value of the cond-form. | |
| 957 If no clause succeeds, cond returns nil. | |
| 958 If a clause has one element, as in (CONDITION), | |
| 959 CONDITION's value if non-nil is returned from the cond-form. | |
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960 |
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961 arguments: (&rest CLAUSES) |
| 428 | 962 */ |
| 963 (args)) | |
| 964 { | |
| 965 /* This function can GC */ | |
| 442 | 966 REGISTER Lisp_Object val; |
| 428 | 967 |
| 968 LIST_LOOP_2 (clause, args) | |
| 969 { | |
| 970 CHECK_CONS (clause); | |
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971 if (!NILP (val = IGNORE_MULTIPLE_VALUES (Feval (XCAR (clause))))) |
| 428 | 972 { |
| 973 if (!NILP (clause = XCDR (clause))) | |
| 974 { | |
| 975 CHECK_TRUE_LIST (clause); | |
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976 /* Pass back any multiple values here: */ |
| 428 | 977 val = Fprogn (clause); |
| 978 } | |
| 979 return val; | |
| 980 } | |
| 981 } | |
| 982 | |
| 983 return Qnil; | |
| 984 } | |
| 985 | |
| 986 DEFUN ("progn", Fprogn, 0, UNEVALLED, 0, /* | |
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987 Eval BODY forms sequentially and return value of last one. |
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988 |
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989 arguments: (&rest BODY) |
| 428 | 990 */ |
| 991 (args)) | |
| 992 { | |
| 993 /* This function can GC */ | |
| 994 /* Caller must provide a true list in ARGS */ | |
| 442 | 995 REGISTER Lisp_Object val = Qnil; |
| 428 | 996 struct gcpro gcpro1; |
| 997 | |
| 998 GCPRO1 (args); | |
| 999 | |
| 1000 { | |
| 1001 LIST_LOOP_2 (form, args) | |
| 1002 val = Feval (form); | |
| 1003 } | |
| 1004 | |
| 1005 UNGCPRO; | |
| 1006 return val; | |
| 1007 } | |
| 1008 | |
| 1009 /* Fprog1() is the canonical example of a function that must GCPRO a | |
| 1010 Lisp_Object across calls to Feval(). */ | |
| 1011 | |
| 1012 DEFUN ("prog1", Fprog1, 1, UNEVALLED, 0, /* | |
| 1013 Similar to `progn', but the value of the first form is returned. | |
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1014 |
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1015 All the arguments are evaluated sequentially. The value of FIRST is saved |
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1016 during evaluation of the remaining args, whose values are discarded. |
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1017 |
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1018 arguments: (FIRST &rest BODY) |
| 428 | 1019 */ |
| 1020 (args)) | |
| 1021 { | |
| 1849 | 1022 Lisp_Object val; |
| 428 | 1023 struct gcpro gcpro1; |
| 1024 | |
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1025 val = IGNORE_MULTIPLE_VALUES (Feval (Fcar (args))); |
| 428 | 1026 |
| 1027 GCPRO1 (val); | |
| 1028 | |
| 1029 { | |
| 1030 LIST_LOOP_2 (form, XCDR (args)) | |
| 1031 Feval (form); | |
| 1032 } | |
| 1033 | |
| 1034 UNGCPRO; | |
| 1035 return val; | |
| 1036 } | |
| 1037 | |
| 1038 DEFUN ("prog2", Fprog2, 2, UNEVALLED, 0, /* | |
| 1039 Similar to `progn', but the value of the second form is returned. | |
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1040 |
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1041 All the arguments are evaluated sequentially. The value of SECOND is saved |
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1042 during evaluation of the remaining args, whose values are discarded. |
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1043 |
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1044 arguments: (FIRST SECOND &rest BODY) |
| 428 | 1045 */ |
| 1046 (args)) | |
| 1047 { | |
| 1048 /* This function can GC */ | |
| 1849 | 1049 Lisp_Object val; |
| 428 | 1050 struct gcpro gcpro1; |
| 1051 | |
| 1052 Feval (XCAR (args)); | |
| 1053 args = XCDR (args); | |
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1054 |
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1055 val = IGNORE_MULTIPLE_VALUES (Feval (XCAR (args))); |
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1056 |
| 428 | 1057 args = XCDR (args); |
| 1058 | |
| 1059 GCPRO1 (val); | |
| 1060 | |
| 442 | 1061 { |
| 1062 LIST_LOOP_2 (form, args) | |
| 1063 Feval (form); | |
| 1064 } | |
| 428 | 1065 |
| 1066 UNGCPRO; | |
| 1067 return val; | |
| 1068 } | |
| 1069 | |
| 1070 DEFUN ("let*", FletX, 1, UNEVALLED, 0, /* | |
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1071 Bind variables according to VARLIST then eval BODY. |
| 428 | 1072 The value of the last form in BODY is returned. |
| 1073 Each element of VARLIST is a symbol (which is bound to nil) | |
| 1074 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
| 1075 Each VALUEFORM can refer to the symbols already bound by this VARLIST. | |
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1076 |
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1077 arguments: (VARLIST &rest BODY) |
| 428 | 1078 */ |
| 1079 (args)) | |
| 1080 { | |
| 1081 /* This function can GC */ | |
| 1082 Lisp_Object varlist = XCAR (args); | |
| 1083 Lisp_Object body = XCDR (args); | |
| 1084 int speccount = specpdl_depth(); | |
| 1085 | |
| 1086 EXTERNAL_LIST_LOOP_3 (var, varlist, tail) | |
| 1087 { | |
| 1088 Lisp_Object symbol, value, tem; | |
| 1089 if (SYMBOLP (var)) | |
| 1090 symbol = var, value = Qnil; | |
| 1091 else | |
| 1092 { | |
| 1093 CHECK_CONS (var); | |
| 1094 symbol = XCAR (var); | |
| 1095 tem = XCDR (var); | |
| 1096 if (NILP (tem)) | |
| 1097 value = Qnil; | |
| 1098 else | |
| 1099 { | |
| 1100 CHECK_CONS (tem); | |
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1101 value = IGNORE_MULTIPLE_VALUES (Feval (XCAR (tem))); |
| 428 | 1102 if (!NILP (XCDR (tem))) |
| 563 | 1103 sferror |
| 428 | 1104 ("`let' bindings can have only one value-form", var); |
| 1105 } | |
| 1106 } | |
| 1107 specbind (symbol, value); | |
| 1108 } | |
| 771 | 1109 return unbind_to_1 (speccount, Fprogn (body)); |
| 428 | 1110 } |
| 1111 | |
| 1112 DEFUN ("let", Flet, 1, UNEVALLED, 0, /* | |
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1113 Bind variables according to VARLIST then eval BODY. |
| 428 | 1114 The value of the last form in BODY is returned. |
| 1115 Each element of VARLIST is a symbol (which is bound to nil) | |
| 1116 or a list (SYMBOL VALUEFORM) (which binds SYMBOL to the value of VALUEFORM). | |
| 1117 All the VALUEFORMs are evalled before any symbols are bound. | |
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1118 |
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1119 arguments: (VARLIST &rest BODY) |
| 428 | 1120 */ |
| 1121 (args)) | |
| 1122 { | |
| 1123 /* This function can GC */ | |
| 1124 Lisp_Object varlist = XCAR (args); | |
| 1125 Lisp_Object body = XCDR (args); | |
| 1126 int speccount = specpdl_depth(); | |
| 1127 Lisp_Object *temps; | |
| 1128 int idx; | |
| 1129 struct gcpro gcpro1; | |
| 1130 | |
| 1131 /* Make space to hold the values to give the bound variables. */ | |
| 1132 { | |
| 1133 int varcount; | |
| 1134 GET_EXTERNAL_LIST_LENGTH (varlist, varcount); | |
| 1135 temps = alloca_array (Lisp_Object, varcount); | |
| 1136 } | |
| 1137 | |
| 1138 /* Compute the values and store them in `temps' */ | |
| 1139 GCPRO1 (*temps); | |
| 1140 gcpro1.nvars = 0; | |
| 1141 | |
| 1142 idx = 0; | |
| 442 | 1143 { |
| 1144 LIST_LOOP_2 (var, varlist) | |
| 1145 { | |
| 1146 Lisp_Object *value = &temps[idx++]; | |
| 1147 if (SYMBOLP (var)) | |
| 1148 *value = Qnil; | |
| 1149 else | |
| 1150 { | |
| 1151 Lisp_Object tem; | |
| 1152 CHECK_CONS (var); | |
| 1153 tem = XCDR (var); | |
| 1154 if (NILP (tem)) | |
| 1155 *value = Qnil; | |
| 1156 else | |
| 1157 { | |
| 1158 CHECK_CONS (tem); | |
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1159 *value = IGNORE_MULTIPLE_VALUES (Feval (XCAR (tem))); |
| 442 | 1160 gcpro1.nvars = idx; |
| 1161 | |
| 1162 if (!NILP (XCDR (tem))) | |
| 563 | 1163 sferror |
| 442 | 1164 ("`let' bindings can have only one value-form", var); |
| 1165 } | |
| 1166 } | |
| 1167 } | |
| 1168 } | |
| 428 | 1169 |
| 1170 idx = 0; | |
| 442 | 1171 { |
| 1172 LIST_LOOP_2 (var, varlist) | |
| 1173 { | |
| 1174 specbind (SYMBOLP (var) ? var : XCAR (var), temps[idx++]); | |
| 1175 } | |
| 1176 } | |
| 428 | 1177 |
| 1178 UNGCPRO; | |
| 1179 | |
| 771 | 1180 return unbind_to_1 (speccount, Fprogn (body)); |
| 428 | 1181 } |
| 1182 | |
| 1183 DEFUN ("while", Fwhile, 1, UNEVALLED, 0, /* | |
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1184 If TEST yields non-nil, eval BODY... and repeat. |
| 428 | 1185 The order of execution is thus TEST, BODY, TEST, BODY and so on |
| 1186 until TEST returns nil. | |
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1187 |
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1188 arguments: (TEST &rest BODY) |
| 428 | 1189 */ |
| 1190 (args)) | |
| 1191 { | |
| 1192 /* This function can GC */ | |
| 1193 Lisp_Object test = XCAR (args); | |
| 1194 Lisp_Object body = XCDR (args); | |
| 1195 | |
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changeset
|
1196 while (!NILP (IGNORE_MULTIPLE_VALUES (Feval (test)))) |
| 428 | 1197 { |
| 1198 QUIT; | |
| 1199 Fprogn (body); | |
| 1200 } | |
| 1201 | |
| 1202 return Qnil; | |
| 1203 } | |
| 1204 | |
| 1205 DEFUN ("setq", Fsetq, 0, UNEVALLED, 0, /* | |
| 1206 \(setq SYM VAL SYM VAL ...): set each SYM to the value of its VAL. | |
| 1207 The symbols SYM are variables; they are literal (not evaluated). | |
| 1208 The values VAL are expressions; they are evaluated. | |
| 1209 Thus, (setq x (1+ y)) sets `x' to the value of `(1+ y)'. | |
| 1210 The second VAL is not computed until after the first SYM is set, and so on; | |
| 1211 each VAL can use the new value of variables set earlier in the `setq'. | |
| 1212 The return value of the `setq' form is the value of the last VAL. | |
| 1213 */ | |
| 1214 (args)) | |
| 1215 { | |
| 1216 /* This function can GC */ | |
| 1217 int nargs; | |
| 2421 | 1218 Lisp_Object retval = Qnil; |
| 428 | 1219 |
| 1220 GET_LIST_LENGTH (args, nargs); | |
| 1221 | |
| 1222 if (nargs & 1) /* Odd number of arguments? */ | |
| 1223 Fsignal (Qwrong_number_of_arguments, list2 (Qsetq, make_int (nargs))); | |
| 1224 | |
| 2421 | 1225 GC_PROPERTY_LIST_LOOP_3 (symbol, val, args) |
| 428 | 1226 { |
| 1227 val = Feval (val); | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
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4657
diff
changeset
|
1228 val = IGNORE_MULTIPLE_VALUES (val); |
| 428 | 1229 Fset (symbol, val); |
| 2421 | 1230 retval = val; |
| 428 | 1231 } |
| 1232 | |
| 2421 | 1233 END_GC_PROPERTY_LIST_LOOP (symbol); |
| 1234 | |
| 1235 return retval; | |
| 428 | 1236 } |
| 1237 | |
| 1238 DEFUN ("quote", Fquote, 1, UNEVALLED, 0, /* | |
| 1239 Return the argument, without evaluating it. `(quote x)' yields `x'. | |
| 3794 | 1240 |
| 3842 | 1241 `quote' differs from `function' in that it is a hint that an expression is |
| 1242 data, not a function. In particular, under some circumstances the byte | |
| 1243 compiler will compile an expression quoted with `function', but it will | |
| 1244 never do so for an expression quoted with `quote'. These issues are most | |
| 1245 important for lambda expressions (see `lambda'). | |
| 1246 | |
| 1247 There is an alternative, more readable, reader syntax for `quote': a Lisp | |
| 1248 object preceded by `''. Thus, `'x' is equivalent to `(quote x)', in all | |
| 1249 contexts. A print function may use either. Internally the expression is | |
| 1250 represented as `(quote x)'). | |
| 428 | 1251 */ |
| 1252 (args)) | |
| 1253 { | |
| 1254 return XCAR (args); | |
| 1255 } | |
| 1256 | |
|
4744
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1257 /* Originally, this was just a function -- but `custom' used a garden- |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1258 variety version, so why not make it a subr? */ |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
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|
1259 DEFUN ("quote-maybe", Fquote_maybe, 1, 1, 0, /* |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
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|
1260 Quote EXPR if it is not self quoting. |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1261 |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1262 In contrast with `quote', this is a function, not a special form; its |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1263 argument is evaluated before `quote-maybe' is called. It returns either |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
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|
1264 EXPR (if it is self-quoting) or a list `(quote EXPR)' if it is not |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1265 self-quoting. Lists starting with the symbol `lambda' are regarded as |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1266 self-quoting. |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
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|
1267 */ |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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4693
diff
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|
1268 (expr)) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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|
1269 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
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|
1270 if ((XTYPE (expr)) == Lisp_Type_Record) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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|
1271 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1272 switch (XRECORD_LHEADER (expr)->type) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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|
1273 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1274 case lrecord_type_symbol: |
|
17f7e9191c0b
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Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1275 if (NILP (expr) || (EQ (expr, Qt)) || SYMBOL_IS_KEYWORD (expr)) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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|
1276 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1277 return expr; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1278 } |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
changeset
|
1279 break; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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|
1280 case lrecord_type_cons: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
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|
1281 if (EQ (XCAR (expr), Qlambda)) |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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|
1282 { |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
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|
1283 return expr; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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4693
diff
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|
1284 } |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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|
1285 break; |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
1286 |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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|
1287 case lrecord_type_vector: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1288 case lrecord_type_string: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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|
1289 case lrecord_type_compiled_function: |
|
17f7e9191c0b
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Aidan Kehoe <kehoea@parhasard.net>
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|
1290 case lrecord_type_bit_vector: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
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|
1291 case lrecord_type_float: |
|
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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diff
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|
1292 case lrecord_type_hash_table: |
|
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Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
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|
1293 case lrecord_type_char_table: |
|
17f7e9191c0b
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Aidan Kehoe <kehoea@parhasard.net>
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|
1294 case lrecord_type_range_table: |
|
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Aidan Kehoe <kehoea@parhasard.net>
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|
1295 case lrecord_type_bignum: |
|
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|
1296 case lrecord_type_ratio: |
|
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|
1297 case lrecord_type_bigfloat: |
|
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|
1298 return expr; |
|
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Aidan Kehoe <kehoea@parhasard.net>
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|
1299 } |
|
17f7e9191c0b
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|
1300 return list2 (Qquote, expr); |
|
17f7e9191c0b
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Aidan Kehoe <kehoea@parhasard.net>
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diff
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|
1301 } |
|
17f7e9191c0b
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diff
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|
1302 |
|
17f7e9191c0b
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|
1303 /* Fixnums and characters are self-quoting: */ |
|
17f7e9191c0b
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|
1304 return expr; |
|
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|
1305 } |
|
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|
1306 |
| 428 | 1307 DEFUN ("function", Ffunction, 1, UNEVALLED, 0, /* |
| 3842 | 1308 Return the argument, without evaluating it. `(function x)' yields `x'. |
| 1309 | |
| 1310 `function' differs from `quote' in that it is a hint that an expression is | |
| 1311 a function, not data. In particular, under some circumstances the byte | |
| 1312 compiler will compile an expression quoted with `function', but it will | |
| 1313 never do so for an expression quoted with `quote'. However, the byte | |
| 1314 compiler will not compile an expression buried in a data structure such as | |
| 1315 a vector or a list which is not syntactically a function. These issues are | |
| 1316 most important for lambda expressions (see `lambda'). | |
| 1317 | |
| 1318 There is an alternative, more readable, reader syntax for `function': a Lisp | |
| 1319 object preceded by `#''. Thus, #'x is equivalent to (function x), in all | |
| 1320 contexts. A print function may use either. Internally the expression is | |
| 1321 represented as `(function x)'). | |
| 428 | 1322 */ |
| 1323 (args)) | |
| 1324 { | |
| 1325 return XCAR (args); | |
| 1326 } | |
| 1327 | |
| 1328 | |
| 1329 /************************************************************************/ | |
| 1330 /* Defining functions/variables */ | |
| 1331 /************************************************************************/ | |
| 1332 static Lisp_Object | |
| 1333 define_function (Lisp_Object name, Lisp_Object defn) | |
| 1334 { | |
| 1335 Ffset (name, defn); | |
|
4535
69a1eda3da06
Distinguish vars and functions in #'symbol-file, #'describe-{function,variable}
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|
1336 LOADHIST_ATTACH (Fcons (Qdefun, name)); |
| 428 | 1337 return name; |
| 1338 } | |
| 1339 | |
| 1340 DEFUN ("defun", Fdefun, 2, UNEVALLED, 0, /* | |
|
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Aidan Kehoe <kehoea@parhasard.net>
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|
1341 Define NAME as a function. |
| 428 | 1342 The definition is (lambda ARGLIST [DOCSTRING] BODY...). |
| 1343 See also the function `interactive'. | |
|
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|
1344 |
|
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|
1345 arguments: (NAME ARGLIST &optional DOCSTRING &rest BODY) |
| 428 | 1346 */ |
| 1347 (args)) | |
| 1348 { | |
| 1349 /* This function can GC */ | |
| 1350 return define_function (XCAR (args), | |
| 1351 Fcons (Qlambda, XCDR (args))); | |
| 1352 } | |
| 1353 | |
| 1354 DEFUN ("defmacro", Fdefmacro, 2, UNEVALLED, 0, /* | |
|
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|
1355 Define NAME as a macro. |
| 428 | 1356 The definition is (macro lambda ARGLIST [DOCSTRING] BODY...). |
| 1357 When the macro is called, as in (NAME ARGS...), | |
| 1358 the function (lambda ARGLIST BODY...) is applied to | |
| 1359 the list ARGS... as it appears in the expression, | |
| 1360 and the result should be a form to be evaluated instead of the original. | |
|
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1361 |
|
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|
1362 arguments: (NAME ARGLIST &optional DOCSTRING &rest BODY) |
| 428 | 1363 */ |
| 1364 (args)) | |
| 1365 { | |
| 1366 /* This function can GC */ | |
| 1367 return define_function (XCAR (args), | |
| 1368 Fcons (Qmacro, Fcons (Qlambda, XCDR (args)))); | |
| 1369 } | |
| 1370 | |
| 1371 DEFUN ("defvar", Fdefvar, 1, UNEVALLED, 0, /* | |
|
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1372 Define SYMBOL as a variable. |
| 428 | 1373 You are not required to define a variable in order to use it, |
| 1374 but the definition can supply documentation and an initial value | |
| 1375 in a way that tags can recognize. | |
| 1376 | |
| 1377 INITVALUE is evaluated, and used to set SYMBOL, only if SYMBOL's value is | |
| 1378 void. (However, when you evaluate a defvar interactively, it acts like a | |
| 1379 defconst: SYMBOL's value is always set regardless of whether it's currently | |
| 1380 void.) | |
| 1381 If SYMBOL is buffer-local, its default value is what is set; | |
| 1382 buffer-local values are not affected. | |
| 1383 INITVALUE and DOCSTRING are optional. | |
| 1384 If DOCSTRING starts with *, this variable is identified as a user option. | |
| 442 | 1385 This means that M-x set-variable recognizes it. |
| 428 | 1386 If INITVALUE is missing, SYMBOL's value is not set. |
| 1387 | |
| 1388 In lisp-interaction-mode defvar is treated as defconst. | |
|
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|
1389 |
|
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|
1390 arguments: (SYMBOL &optional INITVALUE DOCSTRING) |
| 428 | 1391 */ |
| 1392 (args)) | |
| 1393 { | |
| 1394 /* This function can GC */ | |
| 1395 Lisp_Object sym = XCAR (args); | |
| 1396 | |
| 1397 if (!NILP (args = XCDR (args))) | |
| 1398 { | |
| 1399 Lisp_Object val = XCAR (args); | |
| 1400 | |
| 1401 if (NILP (Fdefault_boundp (sym))) | |
| 1402 { | |
| 1403 struct gcpro gcpro1; | |
| 1404 GCPRO1 (val); | |
|
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|
1405 val = IGNORE_MULTIPLE_VALUES (Feval (val)); |
| 428 | 1406 Fset_default (sym, val); |
| 1407 UNGCPRO; | |
| 1408 } | |
| 1409 | |
| 1410 if (!NILP (args = XCDR (args))) | |
| 1411 { | |
| 1412 Lisp_Object doc = XCAR (args); | |
| 1413 Fput (sym, Qvariable_documentation, doc); | |
| 1414 if (!NILP (args = XCDR (args))) | |
| 563 | 1415 signal_error (Qwrong_number_of_arguments, "too many arguments", Qunbound); |
| 428 | 1416 } |
| 1417 } | |
| 1418 | |
| 1419 #ifdef I18N3 | |
| 1420 if (!NILP (Vfile_domain)) | |
| 1421 Fput (sym, Qvariable_domain, Vfile_domain); | |
| 1422 #endif | |
| 1423 | |
| 1424 LOADHIST_ATTACH (sym); | |
| 1425 return sym; | |
| 1426 } | |
| 1427 | |
| 1428 DEFUN ("defconst", Fdefconst, 2, UNEVALLED, 0, /* | |
|
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|
1429 Define SYMBOL as a constant variable. |
| 428 | 1430 The intent is that programs do not change this value, but users may. |
| 1431 Always sets the value of SYMBOL to the result of evalling INITVALUE. | |
| 1432 If SYMBOL is buffer-local, its default value is what is set; | |
| 1433 buffer-local values are not affected. | |
| 1434 DOCSTRING is optional. | |
| 1435 If DOCSTRING starts with *, this variable is identified as a user option. | |
| 442 | 1436 This means that M-x set-variable recognizes it. |
| 428 | 1437 |
| 1438 Note: do not use `defconst' for user options in libraries that are not | |
| 1439 normally loaded, since it is useful for users to be able to specify | |
| 1440 their own values for such variables before loading the library. | |
| 1441 Since `defconst' unconditionally assigns the variable, | |
| 1442 it would override the user's choice. | |
|
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|
1443 |
|
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|
1444 arguments: (SYMBOL &optional INITVALUE DOCSTRING) |
| 428 | 1445 */ |
| 1446 (args)) | |
| 1447 { | |
| 1448 /* This function can GC */ | |
| 1449 Lisp_Object sym = XCAR (args); | |
| 1450 Lisp_Object val = Feval (XCAR (args = XCDR (args))); | |
| 1451 struct gcpro gcpro1; | |
| 1452 | |
| 1453 GCPRO1 (val); | |
| 1454 | |
|
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1455 val = IGNORE_MULTIPLE_VALUES (val); |
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1456 |
| 428 | 1457 Fset_default (sym, val); |
| 1458 | |
| 1459 UNGCPRO; | |
| 1460 | |
| 1461 if (!NILP (args = XCDR (args))) | |
| 1462 { | |
| 1463 Lisp_Object doc = XCAR (args); | |
| 1464 Fput (sym, Qvariable_documentation, doc); | |
| 1465 if (!NILP (args = XCDR (args))) | |
| 563 | 1466 signal_error (Qwrong_number_of_arguments, "too many arguments", Qunbound); |
| 428 | 1467 } |
| 1468 | |
| 1469 #ifdef I18N3 | |
| 1470 if (!NILP (Vfile_domain)) | |
| 1471 Fput (sym, Qvariable_domain, Vfile_domain); | |
| 1472 #endif | |
| 1473 | |
| 1474 LOADHIST_ATTACH (sym); | |
| 1475 return sym; | |
| 1476 } | |
| 1477 | |
|
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1478 /* XEmacs: user-variable-p is in symbols.c, since it needs to mess around |
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1479 with the symbol variable aliases. */ |
| 428 | 1480 |
| 1481 DEFUN ("macroexpand-internal", Fmacroexpand_internal, 1, 2, 0, /* | |
| 1482 Return result of expanding macros at top level of FORM. | |
| 1483 If FORM is not a macro call, it is returned unchanged. | |
| 1484 Otherwise, the macro is expanded and the expansion is considered | |
| 1485 in place of FORM. When a non-macro-call results, it is returned. | |
| 1486 | |
| 442 | 1487 The second optional arg ENVIRONMENT specifies an environment of macro |
| 428 | 1488 definitions to shadow the loaded ones for use in file byte-compilation. |
| 1489 */ | |
| 442 | 1490 (form, environment)) |
| 428 | 1491 { |
| 1492 /* This function can GC */ | |
| 1493 /* With cleanups from Hallvard Furuseth. */ | |
| 1494 REGISTER Lisp_Object expander, sym, def, tem; | |
| 1495 | |
| 1496 while (1) | |
| 1497 { | |
| 1498 /* Come back here each time we expand a macro call, | |
| 1499 in case it expands into another macro call. */ | |
| 1500 if (!CONSP (form)) | |
| 1501 break; | |
| 1502 /* Set SYM, give DEF and TEM right values in case SYM is not a symbol. */ | |
| 1503 def = sym = XCAR (form); | |
| 1504 tem = Qnil; | |
| 1505 /* Trace symbols aliases to other symbols | |
| 1506 until we get a symbol that is not an alias. */ | |
| 1507 while (SYMBOLP (def)) | |
| 1508 { | |
| 1509 QUIT; | |
| 1510 sym = def; | |
| 442 | 1511 tem = Fassq (sym, environment); |
| 428 | 1512 if (NILP (tem)) |
| 1513 { | |
| 1514 def = XSYMBOL (sym)->function; | |
| 1515 if (!UNBOUNDP (def)) | |
| 1516 continue; | |
| 1517 } | |
| 1518 break; | |
| 1519 } | |
| 442 | 1520 /* Right now TEM is the result from SYM in ENVIRONMENT, |
| 428 | 1521 and if TEM is nil then DEF is SYM's function definition. */ |
| 1522 if (NILP (tem)) | |
| 1523 { | |
| 442 | 1524 /* SYM is not mentioned in ENVIRONMENT. |
| 428 | 1525 Look at its function definition. */ |
| 1526 if (UNBOUNDP (def) | |
| 1527 || !CONSP (def)) | |
| 1528 /* Not defined or definition not suitable */ | |
| 1529 break; | |
| 1530 if (EQ (XCAR (def), Qautoload)) | |
| 1531 { | |
| 1532 /* Autoloading function: will it be a macro when loaded? */ | |
| 1533 tem = Felt (def, make_int (4)); | |
| 1534 if (EQ (tem, Qt) || EQ (tem, Qmacro)) | |
| 1535 { | |
| 1536 /* Yes, load it and try again. */ | |
| 970 | 1537 /* do_autoload GCPROs both arguments */ |
| 428 | 1538 do_autoload (def, sym); |
| 1539 continue; | |
| 1540 } | |
| 1541 else | |
| 1542 break; | |
| 1543 } | |
| 1544 else if (!EQ (XCAR (def), Qmacro)) | |
| 1545 break; | |
| 1546 else expander = XCDR (def); | |
| 1547 } | |
| 1548 else | |
| 1549 { | |
| 1550 expander = XCDR (tem); | |
| 1551 if (NILP (expander)) | |
| 1552 break; | |
| 1553 } | |
| 1554 form = apply1 (expander, XCDR (form)); | |
| 1555 } | |
| 1556 return form; | |
| 1557 } | |
| 1558 | |
| 1559 | |
| 1560 /************************************************************************/ | |
| 1561 /* Non-local exits */ | |
| 1562 /************************************************************************/ | |
| 1563 | |
| 1318 | 1564 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 1565 | |
| 1566 int | |
| 1567 proper_redisplay_wrapping_in_place (void) | |
| 1568 { | |
| 1569 return !in_display | |
| 1570 || ((get_inhibit_flags () & INTERNAL_INHIBIT_ERRORS) | |
| 1571 && (get_inhibit_flags () & INTERNAL_INHIBIT_THROWS)); | |
| 1572 } | |
| 1573 | |
| 1574 static void | |
| 1575 check_proper_critical_section_nonlocal_exit_protection (void) | |
| 1576 { | |
| 1577 assert_with_message | |
| 1578 (proper_redisplay_wrapping_in_place (), | |
| 1579 "Attempted non-local exit from within redisplay without being properly wrapped"); | |
| 1580 } | |
| 1581 | |
| 1582 static void | |
| 1583 check_proper_critical_section_lisp_protection (void) | |
| 1584 { | |
| 1585 assert_with_message | |
| 1586 (proper_redisplay_wrapping_in_place (), | |
| 1587 "Attempt to call Lisp code from within redisplay without being properly wrapped"); | |
| 1588 } | |
| 1589 | |
| 1590 #endif /* ERROR_CHECK_TRAPPING_PROBLEMS */ | |
| 1591 | |
| 428 | 1592 DEFUN ("catch", Fcatch, 1, UNEVALLED, 0, /* |
|
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|
1593 Eval BODY allowing nonlocal exits using `throw'. |
| 428 | 1594 TAG is evalled to get the tag to use. Then the BODY is executed. |
| 3577 | 1595 Within BODY, (throw TAG VAL) with same (`eq') tag exits BODY and this `catch'. |
| 428 | 1596 If no throw happens, `catch' returns the value of the last BODY form. |
| 1597 If a throw happens, it specifies the value to return from `catch'. | |
|
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|
1598 |
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|
1599 arguments: (TAG &rest BODY) |
| 428 | 1600 */ |
| 1601 (args)) | |
| 1602 { | |
| 1603 /* This function can GC */ | |
| 1604 Lisp_Object tag = Feval (XCAR (args)); | |
| 1605 Lisp_Object body = XCDR (args); | |
| 2532 | 1606 return internal_catch (tag, Fprogn, body, 0, 0, 0); |
| 428 | 1607 } |
| 1608 | |
| 1609 /* Set up a catch, then call C function FUNC on argument ARG. | |
| 1610 FUNC should return a Lisp_Object. | |
| 1611 This is how catches are done from within C code. */ | |
| 1612 | |
| 1613 Lisp_Object | |
| 1614 internal_catch (Lisp_Object tag, | |
| 1615 Lisp_Object (*func) (Lisp_Object arg), | |
| 1616 Lisp_Object arg, | |
| 853 | 1617 int * volatile threw, |
| 2532 | 1618 Lisp_Object * volatile thrown_tag, |
| 1619 Lisp_Object * volatile backtrace_before_throw) | |
| 428 | 1620 { |
| 1621 /* This structure is made part of the chain `catchlist'. */ | |
| 1622 struct catchtag c; | |
| 1623 | |
| 1624 /* Fill in the components of c, and put it on the list. */ | |
| 1625 c.next = catchlist; | |
| 1626 c.tag = tag; | |
| 853 | 1627 c.actual_tag = Qnil; |
| 2532 | 1628 c.backtrace = Qnil; |
| 428 | 1629 c.val = Qnil; |
| 1630 c.backlist = backtrace_list; | |
| 1631 #if 0 /* FSFmacs */ | |
| 1632 /* #### */ | |
| 1633 c.handlerlist = handlerlist; | |
| 1634 #endif | |
| 1635 c.lisp_eval_depth = lisp_eval_depth; | |
| 1636 c.pdlcount = specpdl_depth(); | |
| 1637 #if 0 /* FSFmacs */ | |
| 1638 c.poll_suppress_count = async_timer_suppress_count; | |
| 1639 #endif | |
| 1640 c.gcpro = gcprolist; | |
| 1641 catchlist = &c; | |
| 1642 | |
| 1643 /* Call FUNC. */ | |
| 1644 if (SETJMP (c.jmp)) | |
| 1645 { | |
| 1646 /* Throw works by a longjmp that comes right here. */ | |
| 1647 if (threw) *threw = 1; | |
| 853 | 1648 if (thrown_tag) *thrown_tag = c.actual_tag; |
| 2532 | 1649 if (backtrace_before_throw) *backtrace_before_throw = c.backtrace; |
| 428 | 1650 return c.val; |
| 1651 } | |
| 1652 c.val = (*func) (arg); | |
| 1653 if (threw) *threw = 0; | |
| 853 | 1654 if (thrown_tag) *thrown_tag = Qnil; |
| 428 | 1655 catchlist = c.next; |
| 853 | 1656 check_catchlist_sanity (); |
| 428 | 1657 return c.val; |
| 1658 } | |
| 1659 | |
| 1660 | |
| 1661 /* Unwind the specbind, catch, and handler stacks back to CATCH, and | |
| 1662 jump to that CATCH, returning VALUE as the value of that catch. | |
| 1663 | |
| 2297 | 1664 This is the guts of Fthrow and Fsignal; they differ only in the |
| 1665 way they choose the catch tag to throw to. A catch tag for a | |
| 428 | 1666 condition-case form has a TAG of Qnil. |
| 1667 | |
| 1668 Before each catch is discarded, unbind all special bindings and | |
| 1669 execute all unwind-protect clauses made above that catch. Unwind | |
| 1670 the handler stack as we go, so that the proper handlers are in | |
| 1671 effect for each unwind-protect clause we run. At the end, restore | |
| 1672 some static info saved in CATCH, and longjmp to the location | |
| 1673 specified in the | |
| 1674 | |
| 1675 This is used for correct unwinding in Fthrow and Fsignal. */ | |
| 1676 | |
| 2268 | 1677 static DECLARE_DOESNT_RETURN (unwind_to_catch (struct catchtag *, Lisp_Object, |
| 1678 Lisp_Object)); | |
| 1679 | |
| 1680 static DOESNT_RETURN | |
| 853 | 1681 unwind_to_catch (struct catchtag *c, Lisp_Object val, Lisp_Object tag) |
| 428 | 1682 { |
| 1683 REGISTER int last_time; | |
| 1684 | |
| 1685 /* Unwind the specbind, catch, and handler stacks back to CATCH | |
| 1686 Before each catch is discarded, unbind all special bindings | |
| 1687 and execute all unwind-protect clauses made above that catch. | |
| 1688 At the end, restore some static info saved in CATCH, | |
| 1689 and longjmp to the location specified. | |
| 1690 */ | |
| 1691 | |
| 1692 /* Save the value somewhere it will be GC'ed. | |
| 1693 (Can't overwrite tag slot because an unwind-protect may | |
| 1694 want to throw to this same tag, which isn't yet invalid.) */ | |
| 1695 c->val = val; | |
| 853 | 1696 c->actual_tag = tag; |
| 428 | 1697 |
| 1698 #if 0 /* FSFmacs */ | |
| 1699 /* Restore the polling-suppression count. */ | |
| 1700 set_poll_suppress_count (catch->poll_suppress_count); | |
| 1701 #endif | |
| 1702 | |
| 617 | 1703 #if 1 |
| 428 | 1704 do |
| 1705 { | |
| 1706 last_time = catchlist == c; | |
| 1707 | |
| 1708 /* Unwind the specpdl stack, and then restore the proper set of | |
| 1709 handlers. */ | |
| 771 | 1710 unbind_to (catchlist->pdlcount); |
| 428 | 1711 catchlist = catchlist->next; |
| 853 | 1712 check_catchlist_sanity (); |
| 428 | 1713 } |
| 1714 while (! last_time); | |
| 617 | 1715 #else |
| 1716 /* Former XEmacs code. This is definitely not as correct because | |
| 1717 there may be a number of catches we're unwinding, and a number | |
| 1718 of unwind-protects in the process. By not undoing the catches till | |
| 1719 the end, there may be invalid catches still current. (This would | |
| 1720 be a particular problem with code like this: | |
| 1721 | |
| 1722 (catch 'foo | |
| 1723 (call-some-code-which-does... | |
| 1724 (catch 'bar | |
| 1725 (unwind-protect | |
| 1726 (call-some-code-which-does... | |
| 1727 (catch 'bar | |
| 1728 (call-some-code-which-does... | |
| 1729 (throw 'foo nil)))) | |
| 1730 (throw 'bar nil))))) | |
| 1731 | |
| 1732 This would try to throw to the inner (catch 'bar)! | |
| 1733 | |
| 1734 --ben | |
| 1735 */ | |
| 428 | 1736 /* Unwind the specpdl stack */ |
| 771 | 1737 unbind_to (c->pdlcount); |
| 428 | 1738 catchlist = c->next; |
| 853 | 1739 check_catchlist_sanity (); |
| 617 | 1740 #endif /* Former code */ |
| 428 | 1741 |
| 1204 | 1742 UNWIND_GCPRO_TO (c->gcpro); |
| 1292 | 1743 if (profiling_active) |
| 1744 { | |
| 1745 while (backtrace_list != c->backlist) | |
| 1746 { | |
| 1747 profile_record_unwind (backtrace_list); | |
| 1748 backtrace_list = backtrace_list->next; | |
| 1749 } | |
| 1750 } | |
| 1751 else | |
| 1752 backtrace_list = c->backlist; | |
| 428 | 1753 lisp_eval_depth = c->lisp_eval_depth; |
| 1754 | |
| 442 | 1755 #ifdef DEFEND_AGAINST_THROW_RECURSION |
| 428 | 1756 throw_level = 0; |
| 1757 #endif | |
| 1758 LONGJMP (c->jmp, 1); | |
| 1759 } | |
| 1760 | |
|
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parents:
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|
1761 DECLARE_DOESNT_RETURN (throw_or_bomb_out (Lisp_Object, Lisp_Object, int, |
|
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parents:
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|
1762 Lisp_Object, Lisp_Object)); |
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parents:
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1763 |
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1764 DOESNT_RETURN |
| 428 | 1765 throw_or_bomb_out (Lisp_Object tag, Lisp_Object val, int bomb_out_p, |
| 1766 Lisp_Object sig, Lisp_Object data) | |
| 1767 { | |
| 442 | 1768 #ifdef DEFEND_AGAINST_THROW_RECURSION |
| 428 | 1769 /* die if we recurse more than is reasonable */ |
| 1770 if (++throw_level > 20) | |
| 2500 | 1771 ABORT (); |
| 428 | 1772 #endif |
| 1773 | |
| 1318 | 1774 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 1123 | 1775 check_proper_critical_section_nonlocal_exit_protection (); |
| 1318 | 1776 #endif |
| 1123 | 1777 |
| 428 | 1778 /* If bomb_out_p is t, this is being called from Fsignal as a |
| 1779 "last resort" when there is no handler for this error and | |
| 1780 the debugger couldn't be invoked, so we are throwing to | |
| 3025 | 1781 `top-level'. If this tag doesn't exist (happens during the |
| 428 | 1782 initialization stages) we would get in an infinite recursive |
| 1783 Fsignal/Fthrow loop, so instead we bomb out to the | |
| 1784 really-early-error-handler. | |
| 1785 | |
| 1786 Note that in fact the only time that the "last resort" | |
| 3025 | 1787 occurs is when there's no catch for `top-level' -- the |
| 1788 `top-level' catch and the catch-all error handler are | |
| 428 | 1789 established at the same time, in initial_command_loop/ |
| 1790 top_level_1. | |
| 1791 | |
| 853 | 1792 [[#### Fix this horrifitude!]] |
| 1793 | |
| 1794 I don't think this is horrifitude, just defensive programming. --ben | |
| 428 | 1795 */ |
| 1796 | |
| 1797 while (1) | |
| 1798 { | |
| 1799 REGISTER struct catchtag *c; | |
| 1800 | |
| 1801 #if 0 /* FSFmacs */ | |
| 1802 if (!NILP (tag)) /* #### */ | |
| 1803 #endif | |
| 1804 for (c = catchlist; c; c = c->next) | |
| 1805 { | |
| 2532 | 1806 if (EQ (c->tag, Vcatch_everything_tag)) |
| 1807 c->backtrace = maybe_get_trapping_problems_backtrace (); | |
| 853 | 1808 if (EQ (c->tag, tag) || EQ (c->tag, Vcatch_everything_tag)) |
| 1809 unwind_to_catch (c, val, tag); | |
| 428 | 1810 } |
| 1811 if (!bomb_out_p) | |
| 1812 tag = Fsignal (Qno_catch, list2 (tag, val)); | |
| 1813 else | |
| 1814 call1 (Qreally_early_error_handler, Fcons (sig, data)); | |
| 1815 } | |
| 1816 } | |
| 1817 | |
| 1818 /* See above, where CATCHLIST is defined, for a description of how | |
| 1819 Fthrow() works. | |
| 1820 | |
| 1821 Fthrow() is also called by Fsignal(), to do a non-local jump | |
| 1822 back to the appropriate condition-case handler after (maybe) | |
| 1823 the debugger is entered. In that case, TAG is the value | |
| 1824 of Vcondition_handlers that was in place just after the | |
| 1825 condition-case handler was set up. The car of this will be | |
| 1826 some data referring to the handler: Its car will be Qunbound | |
| 1827 (thus, this tag can never be generated by Lisp code), and | |
| 1828 its CDR will be the HANDLERS argument to condition_case_1() | |
| 1829 (either Qerror, Qt, or a list of handlers as in `condition-case'). | |
| 1830 This works fine because Fthrow() does not care what TAG was | |
| 1831 passed to it: it just looks up the catch list for something | |
| 1832 that is EQ() to TAG. When it finds it, it will longjmp() | |
| 1833 back to the place that established the catch (in this case, | |
| 1834 condition_case_1). See below for more info. | |
| 1835 */ | |
| 1836 | |
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1837 DEFUN_NORETURN ("throw", Fthrow, 2, UNEVALLED, 0, /* |
| 444 | 1838 Throw to the catch for TAG and return VALUE from it. |
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1839 |
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1840 Both TAG and VALUE are evalled, and multiple values in VALUE will be passed |
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1841 back. Tags are the same if and only if they are `eq'. |
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1842 |
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1843 arguments: (TAG VALUE) |
| 428 | 1844 */ |
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1845 (args)) |
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1846 { |
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1847 int nargs; |
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1848 Lisp_Object tag, value; |
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1849 |
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1850 GET_LIST_LENGTH (args, nargs); |
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1851 if (nargs != 2) |
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1852 { |
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1853 Fsignal (Qwrong_number_of_arguments, list2 (Qthrow, make_int (nargs))); |
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1854 } |
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1855 |
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1856 tag = IGNORE_MULTIPLE_VALUES (Feval (XCAR(args))); |
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1857 |
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1858 value = Feval (XCAR (XCDR (args))); |
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8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
1859 |
| 444 | 1860 throw_or_bomb_out (tag, value, 0, Qnil, Qnil); /* Doesn't return */ |
| 2268 | 1861 RETURN_NOT_REACHED (Qnil); |
| 428 | 1862 } |
| 1863 | |
| 1864 DEFUN ("unwind-protect", Funwind_protect, 1, UNEVALLED, 0, /* | |
| 1865 Do BODYFORM, protecting with UNWINDFORMS. | |
| 1866 If BODYFORM completes normally, its value is returned | |
| 1867 after executing the UNWINDFORMS. | |
| 1868 If BODYFORM exits nonlocally, the UNWINDFORMS are executed anyway. | |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
1869 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
1870 arguments: (BODYFORM &rest UNWINDFORMS) |
| 428 | 1871 */ |
| 1872 (args)) | |
| 1873 { | |
| 1874 /* This function can GC */ | |
| 1875 int speccount = specpdl_depth(); | |
| 1876 | |
| 1877 record_unwind_protect (Fprogn, XCDR (args)); | |
| 771 | 1878 return unbind_to_1 (speccount, Feval (XCAR (args))); |
| 428 | 1879 } |
| 1880 | |
| 1881 | |
| 1882 /************************************************************************/ | |
| 1292 | 1883 /* Trapping errors */ |
| 428 | 1884 /************************************************************************/ |
| 1885 | |
| 1886 static Lisp_Object | |
| 1887 condition_bind_unwind (Lisp_Object loser) | |
| 1888 { | |
| 617 | 1889 /* There is no problem freeing stuff here like there is in |
| 1890 condition_case_unwind(), because there are no outside pointers | |
| 1891 (like the tag below in the catchlist) pointing to the objects. */ | |
| 853 | 1892 |
| 428 | 1893 /* ((handler-fun . handler-args) ... other handlers) */ |
| 1894 Lisp_Object tem = XCAR (loser); | |
| 853 | 1895 int first = 1; |
| 428 | 1896 |
| 1897 while (CONSP (tem)) | |
| 1898 { | |
| 853 | 1899 Lisp_Object victim = tem; |
| 1900 if (first && OPAQUE_PTRP (XCAR (victim))) | |
| 1901 free_opaque_ptr (XCAR (victim)); | |
| 1902 first = 0; | |
| 1903 tem = XCDR (victim); | |
| 428 | 1904 free_cons (victim); |
| 1905 } | |
| 1906 | |
| 1907 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */ | |
| 853 | 1908 Vcondition_handlers = XCDR (loser); |
| 1909 | |
| 1910 free_cons (loser); | |
| 428 | 1911 return Qnil; |
| 1912 } | |
| 1913 | |
| 1914 static Lisp_Object | |
| 1915 condition_case_unwind (Lisp_Object loser) | |
| 1916 { | |
| 1917 /* ((<unbound> . clauses) ... other handlers */ | |
| 617 | 1918 /* NO! Doing this now leaves the tag deleted in a still-active |
| 1919 catch. With the recent changes to unwind_to_catch(), the | |
| 1920 evil situation might not happen any more; it certainly could | |
| 1921 happen before because it did. But it's very precarious to rely | |
| 1922 on something like this. #### Instead we should rewrite, adopting | |
| 1923 the FSF's mechanism with a struct handler instead of | |
| 1924 Vcondition_handlers; then we have NO Lisp-object structures used | |
| 1925 to hold all of the values, and there's no possibility either of | |
| 1926 crashes from freeing objects too quickly, or objects not getting | |
| 1927 freed and hanging around till the next GC. | |
| 1928 | |
| 1929 In practice, the extra consing here should not matter because | |
| 1930 it only happens when we throw past the condition-case, which almost | |
| 1931 always is the result of an error. Most of the time, there will be | |
| 1932 no error, and we will free the objects below in the main function. | |
| 1933 | |
| 1934 --ben | |
| 1935 | |
| 1936 DO NOT DO: free_cons (XCAR (loser)); | |
| 1937 */ | |
| 1938 | |
| 428 | 1939 if (EQ (loser, Vcondition_handlers)) /* may have been rebound to some tail */ |
| 617 | 1940 Vcondition_handlers = XCDR (loser); |
| 1941 | |
| 1942 /* DO NOT DO: free_cons (loser); */ | |
| 428 | 1943 return Qnil; |
| 1944 } | |
| 1945 | |
| 1946 /* Split out from condition_case_3 so that primitive C callers | |
| 1947 don't have to cons up a lisp handler form to be evaluated. */ | |
| 1948 | |
| 1949 /* Call a function BFUN of one argument BARG, trapping errors as | |
| 1950 specified by HANDLERS. If no error occurs that is indicated by | |
| 1951 HANDLERS as something to be caught, the return value of this | |
| 1952 function is the return value from BFUN. If such an error does | |
| 1953 occur, HFUN is called, and its return value becomes the | |
| 1954 return value of condition_case_1(). The second argument passed | |
| 1955 to HFUN will always be HARG. The first argument depends on | |
| 1956 HANDLERS: | |
| 1957 | |
| 1958 If HANDLERS is Qt, all errors (this includes QUIT, but not | |
| 1959 non-local exits with `throw') cause HFUN to be invoked, and VAL | |
| 1960 (the first argument to HFUN) is a cons (SIG . DATA) of the | |
| 1961 arguments passed to `signal'. The debugger is not invoked even if | |
| 1962 `debug-on-error' was set. | |
| 1963 | |
| 1964 A HANDLERS value of Qerror is the same as Qt except that the | |
| 1965 debugger is invoked if `debug-on-error' was set. | |
| 1966 | |
| 1967 Otherwise, HANDLERS should be a list of lists (CONDITION-NAME BODY ...) | |
| 1968 exactly as in `condition-case', and errors will be trapped | |
| 1969 as indicated in HANDLERS. VAL (the first argument to HFUN) will | |
| 1970 be a cons whose car is the cons (SIG . DATA) and whose CDR is the | |
| 1971 list (BODY ...) from the appropriate slot in HANDLERS. | |
| 1972 | |
| 1973 This function pushes HANDLERS onto the front of Vcondition_handlers | |
| 1974 (actually with a Qunbound marker as well -- see Fthrow() above | |
| 1975 for why), establishes a catch whose tag is this new value of | |
| 1976 Vcondition_handlers, and calls BFUN. When Fsignal() is called, | |
| 1977 it calls Fthrow(), setting TAG to this same new value of | |
| 1978 Vcondition_handlers and setting VAL to the same thing that will | |
| 1979 be passed to HFUN, as above. Fthrow() longjmp()s back to the | |
| 1980 jump point we just established, and we in turn just call the | |
| 1981 HFUN and return its value. | |
| 1982 | |
| 1983 For a real condition-case, HFUN will always be | |
| 1984 run_condition_case_handlers() and HARG is the argument VAR | |
| 1985 to condition-case. That function just binds VAR to the cons | |
| 1986 (SIG . DATA) that is the CAR of VAL, and calls the handler | |
| 1987 (BODY ...) that is the CDR of VAL. Note that before calling | |
| 1988 Fthrow(), Fsignal() restored Vcondition_handlers to the value | |
| 1989 it had *before* condition_case_1() was called. This maintains | |
| 1990 consistency (so that the state of things at exit of | |
| 1991 condition_case_1() is the same as at entry), and implies | |
| 1992 that the handler can signal the same error again (possibly | |
| 1993 after processing of its own), without getting in an infinite | |
| 1994 loop. */ | |
| 1995 | |
| 1996 Lisp_Object | |
| 1997 condition_case_1 (Lisp_Object handlers, | |
| 1998 Lisp_Object (*bfun) (Lisp_Object barg), | |
| 1999 Lisp_Object barg, | |
| 2000 Lisp_Object (*hfun) (Lisp_Object val, Lisp_Object harg), | |
| 2001 Lisp_Object harg) | |
| 2002 { | |
| 2003 int speccount = specpdl_depth(); | |
| 2004 struct catchtag c; | |
| 617 | 2005 struct gcpro gcpro1, gcpro2, gcpro3; |
| 428 | 2006 |
| 2007 #if 0 /* FSFmacs */ | |
| 2008 c.tag = Qnil; | |
| 2009 #else | |
| 2010 /* Do consing now so out-of-memory error happens up front */ | |
| 2011 /* (unbound . stuff) is a special condition-case kludge marker | |
| 2012 which is known specially by Fsignal. | |
| 617 | 2013 [[ This is an abomination, but to fix it would require either |
| 428 | 2014 making condition_case cons (a union of the conditions of the clauses) |
| 617 | 2015 or changing the byte-compiler output (no thanks).]] |
| 2016 | |
| 2017 The above comment is clearly wrong. FSF does not do it this way | |
| 2018 and did not change the byte-compiler output. Instead they use a | |
| 2019 `struct handler' to hold the various values (in place of our | |
| 2020 Vcondition_handlers) and chain them together, with pointers from | |
| 2021 the `struct catchtag' to the `struct handler'. We should perhaps | |
| 2022 consider moving to something similar, but not before I merge my | |
| 2023 stderr-proc workspace, which contains changes to these | |
| 2024 functions. --ben */ | |
| 428 | 2025 c.tag = noseeum_cons (noseeum_cons (Qunbound, handlers), |
| 2026 Vcondition_handlers); | |
| 2027 #endif | |
| 2028 c.val = Qnil; | |
| 853 | 2029 c.actual_tag = Qnil; |
| 2532 | 2030 c.backtrace = Qnil; |
| 428 | 2031 c.backlist = backtrace_list; |
| 2032 #if 0 /* FSFmacs */ | |
| 2033 /* #### */ | |
| 2034 c.handlerlist = handlerlist; | |
| 2035 #endif | |
| 2036 c.lisp_eval_depth = lisp_eval_depth; | |
| 2037 c.pdlcount = specpdl_depth(); | |
| 2038 #if 0 /* FSFmacs */ | |
| 2039 c.poll_suppress_count = async_timer_suppress_count; | |
| 2040 #endif | |
| 2041 c.gcpro = gcprolist; | |
| 2042 /* #### FSFmacs does the following statement *after* the setjmp(). */ | |
| 2043 c.next = catchlist; | |
| 2044 | |
| 2045 if (SETJMP (c.jmp)) | |
| 2046 { | |
| 2047 /* throw does ungcpro, etc */ | |
| 2048 return (*hfun) (c.val, harg); | |
| 2049 } | |
| 2050 | |
| 2051 record_unwind_protect (condition_case_unwind, c.tag); | |
| 2052 | |
| 2053 catchlist = &c; | |
| 2054 #if 0 /* FSFmacs */ | |
| 2055 h.handler = handlers; | |
| 2056 h.var = Qnil; | |
| 2057 h.next = handlerlist; | |
| 2058 h.tag = &c; | |
| 2059 handlerlist = &h; | |
| 2060 #else | |
| 2061 Vcondition_handlers = c.tag; | |
| 2062 #endif | |
| 2063 GCPRO1 (harg); /* Somebody has to gc-protect */ | |
| 2064 c.val = ((*bfun) (barg)); | |
| 2065 UNGCPRO; | |
| 617 | 2066 |
| 2067 /* Once we change `catchlist' below, the stuff in c will not be GCPRO'd. */ | |
| 2068 GCPRO3 (harg, c.val, c.tag); | |
| 2069 | |
| 428 | 2070 catchlist = c.next; |
| 853 | 2071 check_catchlist_sanity (); |
| 617 | 2072 /* Note: The unbind also resets Vcondition_handlers. Maybe we should |
| 2073 delete this here. */ | |
| 428 | 2074 Vcondition_handlers = XCDR (c.tag); |
| 771 | 2075 unbind_to (speccount); |
| 617 | 2076 |
| 2077 UNGCPRO; | |
| 2078 /* free the conses *after* the unbind, because the unbind will run | |
| 2079 condition_case_unwind above. */ | |
| 853 | 2080 free_cons (XCAR (c.tag)); |
| 2081 free_cons (c.tag); | |
| 617 | 2082 return c.val; |
| 428 | 2083 } |
| 2084 | |
| 2085 static Lisp_Object | |
| 2086 run_condition_case_handlers (Lisp_Object val, Lisp_Object var) | |
| 2087 { | |
| 2088 /* This function can GC */ | |
| 2089 #if 0 /* FSFmacs */ | |
| 2090 if (!NILP (h.var)) | |
| 2091 specbind (h.var, c.val); | |
| 2092 val = Fprogn (Fcdr (h.chosen_clause)); | |
| 2093 | |
| 2094 /* Note that this just undoes the binding of h.var; whoever | |
| 2095 longjmp()ed to us unwound the stack to c.pdlcount before | |
| 2096 throwing. */ | |
| 771 | 2097 unbind_to (c.pdlcount); |
| 428 | 2098 return val; |
| 2099 #else | |
| 2100 int speccount; | |
| 2101 | |
| 2102 CHECK_TRUE_LIST (val); | |
| 2103 if (NILP (var)) | |
| 2104 return Fprogn (Fcdr (val)); /* tail call */ | |
| 2105 | |
| 2106 speccount = specpdl_depth(); | |
| 2107 specbind (var, Fcar (val)); | |
| 2108 val = Fprogn (Fcdr (val)); | |
| 771 | 2109 return unbind_to_1 (speccount, val); |
| 428 | 2110 #endif |
| 2111 } | |
| 2112 | |
| 2113 /* Here for bytecode to call non-consfully. This is exactly like | |
| 2114 condition-case except that it takes three arguments rather | |
| 2115 than a single list of arguments. */ | |
| 2116 Lisp_Object | |
| 2117 condition_case_3 (Lisp_Object bodyform, Lisp_Object var, Lisp_Object handlers) | |
| 2118 { | |
| 2119 /* This function can GC */ | |
| 2120 EXTERNAL_LIST_LOOP_2 (handler, handlers) | |
| 2121 { | |
| 2122 if (NILP (handler)) | |
| 2123 ; | |
| 2124 else if (CONSP (handler)) | |
| 2125 { | |
| 2126 Lisp_Object conditions = XCAR (handler); | |
| 2127 /* CONDITIONS must a condition name or a list of condition names */ | |
| 2128 if (SYMBOLP (conditions)) | |
| 2129 ; | |
| 2130 else | |
| 2131 { | |
| 2132 EXTERNAL_LIST_LOOP_2 (condition, conditions) | |
| 2133 if (!SYMBOLP (condition)) | |
| 2134 goto invalid_condition_handler; | |
| 2135 } | |
| 2136 } | |
| 2137 else | |
| 2138 { | |
| 2139 invalid_condition_handler: | |
| 563 | 2140 sferror ("Invalid condition handler", handler); |
| 428 | 2141 } |
| 2142 } | |
| 2143 | |
| 2144 CHECK_SYMBOL (var); | |
| 2145 | |
| 2146 return condition_case_1 (handlers, | |
| 2147 Feval, bodyform, | |
| 2148 run_condition_case_handlers, | |
| 2149 var); | |
| 2150 } | |
| 2151 | |
| 2152 DEFUN ("condition-case", Fcondition_case, 2, UNEVALLED, 0, /* | |
| 2153 Regain control when an error is signalled. | |
| 2154 Usage looks like (condition-case VAR BODYFORM HANDLERS...). | |
| 2155 Executes BODYFORM and returns its value if no error happens. | |
| 2156 Each element of HANDLERS looks like (CONDITION-NAME BODY...) | |
| 2157 where the BODY is made of Lisp expressions. | |
| 2158 | |
| 771 | 2159 A typical usage of `condition-case' looks like this: |
| 2160 | |
| 2161 (condition-case nil | |
| 2162 ;; you need a progn here if you want more than one statement ... | |
| 2163 (progn | |
| 2164 (do-something) | |
| 2165 (do-something-else)) | |
| 2166 (error | |
| 2167 (issue-warning-or) | |
| 2168 ;; but strangely, you don't need one here. | |
| 2169 (return-a-value-etc) | |
| 2170 )) | |
| 2171 | |
| 428 | 2172 A handler is applicable to an error if CONDITION-NAME is one of the |
| 2173 error's condition names. If an error happens, the first applicable | |
| 2174 handler is run. As a special case, a CONDITION-NAME of t matches | |
| 2175 all errors, even those without the `error' condition name on them | |
| 2176 \(e.g. `quit'). | |
| 2177 | |
| 2178 The car of a handler may be a list of condition names | |
| 2179 instead of a single condition name. | |
| 2180 | |
| 2181 When a handler handles an error, | |
| 2182 control returns to the condition-case and the handler BODY... is executed | |
| 2183 with VAR bound to (SIGNALED-CONDITIONS . SIGNAL-DATA). | |
| 2184 VAR may be nil; then you do not get access to the signal information. | |
| 2185 | |
| 2186 The value of the last BODY form is returned from the condition-case. | |
| 2187 See also the function `signal' for more info. | |
| 2188 | |
| 2189 Note that at the time the condition handler is invoked, the Lisp stack | |
| 2190 and the current catches, condition-cases, and bindings have all been | |
| 2191 popped back to the state they were in just before the call to | |
| 2192 `condition-case'. This means that resignalling the error from | |
| 2193 within the handler will not result in an infinite loop. | |
| 2194 | |
| 2195 If you want to establish an error handler that is called with the | |
| 2196 Lisp stack, bindings, etc. as they were when `signal' was called, | |
| 2197 rather than when the handler was set, use `call-with-condition-handler'. | |
| 2198 */ | |
| 2199 (args)) | |
| 2200 { | |
| 2201 /* This function can GC */ | |
| 2202 Lisp_Object var = XCAR (args); | |
| 2203 Lisp_Object bodyform = XCAR (XCDR (args)); | |
| 2204 Lisp_Object handlers = XCDR (XCDR (args)); | |
| 2205 return condition_case_3 (bodyform, var, handlers); | |
| 2206 } | |
| 2207 | |
| 2208 DEFUN ("call-with-condition-handler", Fcall_with_condition_handler, 2, MANY, 0, /* | |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
2209 Call FUNCTION with arguments ARGS, regaining control on error. |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
2210 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
2211 This function is similar to `condition-case', but HANDLER is invoked |
| 428 | 2212 with the same environment (Lisp stack, bindings, catches, condition-cases) |
| 2213 that was current when `signal' was called, rather than when the handler | |
| 2214 was established. | |
| 2215 | |
| 2216 HANDLER should be a function of one argument, which is a cons of the args | |
| 2217 \(SIG . DATA) that were passed to `signal'. It is invoked whenever | |
| 2218 `signal' is called (this differs from `condition-case', which allows | |
| 2219 you to specify which errors are trapped). If the handler function | |
| 2220 returns, `signal' continues as if the handler were never invoked. | |
| 2221 \(It continues to look for handlers established earlier than this one, | |
| 2222 and invokes the standard error-handler if none is found.) | |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
2223 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
2224 arguments: (HANDLER FUNCTION &rest ARGS) |
| 428 | 2225 */ |
| 2226 (int nargs, Lisp_Object *args)) /* Note! Args side-effected! */ | |
| 2227 { | |
| 2228 /* This function can GC */ | |
| 2229 int speccount = specpdl_depth(); | |
| 2230 Lisp_Object tem; | |
| 2231 | |
| 853 | 2232 tem = Ffunction_max_args (args[0]); |
| 2233 if (! (XINT (Ffunction_min_args (args[0])) <= 1 | |
| 2234 && (NILP (tem) || 1 <= XINT (tem)))) | |
| 2235 invalid_argument ("Must be function of one argument", args[0]); | |
| 2236 | |
| 2237 /* (handler-fun . handler-args) but currently there are no handler-args */ | |
| 428 | 2238 tem = noseeum_cons (list1 (args[0]), Vcondition_handlers); |
| 2239 record_unwind_protect (condition_bind_unwind, tem); | |
| 2240 Vcondition_handlers = tem; | |
| 2241 | |
| 2242 /* Caller should have GC-protected args */ | |
| 771 | 2243 return unbind_to_1 (speccount, Ffuncall (nargs - 1, args + 1)); |
| 428 | 2244 } |
| 2245 | |
| 853 | 2246 /* This is the C version of the above function. It calls FUN, passing it |
| 2247 ARG, first setting up HANDLER to catch signals in the environment in | |
| 2248 which they were signalled. (HANDLER is only invoked if there was no | |
| 2249 handler (either from condition-case or call-with-condition-handler) set | |
| 2250 later on that handled the signal; therefore, this is a real error. | |
| 2251 | |
| 2252 HANDLER is invoked with three arguments: the ERROR-SYMBOL and DATA as | |
| 2253 passed to `signal', and HANDLER_ARG. Originally I made HANDLER_ARG and | |
| 2254 ARG be void * to facilitate passing structures, but I changed to | |
| 2255 Lisp_Objects because all the other C interfaces to catch/condition-case/etc. | |
| 2256 take Lisp_Objects, and it is easy enough to use make_opaque_ptr() et al. | |
| 2257 to convert between Lisp_Objects and structure pointers. */ | |
| 2258 | |
| 2259 Lisp_Object | |
| 2260 call_with_condition_handler (Lisp_Object (*handler) (Lisp_Object, Lisp_Object, | |
| 2261 Lisp_Object), | |
| 2262 Lisp_Object handler_arg, | |
| 2263 Lisp_Object (*fun) (Lisp_Object), | |
| 2264 Lisp_Object arg) | |
| 2265 { | |
| 2266 /* This function can GC */ | |
| 1111 | 2267 int speccount = specpdl_depth (); |
| 853 | 2268 Lisp_Object tem; |
| 2269 | |
| 2270 /* ((handler-fun . (handler-arg . nil)) ... ) */ | |
| 1111 | 2271 tem = noseeum_cons (noseeum_cons (make_opaque_ptr ((void *) handler), |
| 853 | 2272 noseeum_cons (handler_arg, Qnil)), |
| 2273 Vcondition_handlers); | |
| 2274 record_unwind_protect (condition_bind_unwind, tem); | |
| 2275 Vcondition_handlers = tem; | |
| 2276 | |
| 2277 return unbind_to_1 (speccount, (*fun) (arg)); | |
| 2278 } | |
| 2279 | |
| 428 | 2280 static int |
| 2281 condition_type_p (Lisp_Object type, Lisp_Object conditions) | |
| 2282 { | |
| 2283 if (EQ (type, Qt)) | |
| 2284 /* (condition-case c # (t c)) catches -all- signals | |
| 2285 * Use with caution! */ | |
| 2286 return 1; | |
| 2287 | |
| 2288 if (SYMBOLP (type)) | |
| 2289 return !NILP (Fmemq (type, conditions)); | |
| 2290 | |
| 2291 for (; CONSP (type); type = XCDR (type)) | |
| 2292 if (!NILP (Fmemq (XCAR (type), conditions))) | |
| 2293 return 1; | |
| 2294 | |
| 2295 return 0; | |
| 2296 } | |
| 2297 | |
| 2298 static Lisp_Object | |
| 2299 return_from_signal (Lisp_Object value) | |
| 2300 { | |
| 2301 #if 1 | |
| 2302 /* Most callers are not prepared to handle gc if this | |
| 2303 returns. So, since this feature is not very useful, | |
| 2304 take it out. */ | |
| 2305 /* Have called debugger; return value to signaller */ | |
| 2306 return value; | |
| 2307 #else /* But the reality is that that stinks, because: */ | |
| 2308 /* GACK!!! Really want some way for debug-on-quit errors | |
| 2309 to be continuable!! */ | |
| 563 | 2310 signal_error (Qunimplemented, |
| 2311 "Returning a value from an error is no longer supported", | |
| 2312 Qunbound); | |
| 428 | 2313 #endif |
| 2314 } | |
| 2315 | |
| 2316 | |
| 2317 /************************************************************************/ | |
| 2318 /* the workhorse error-signaling function */ | |
| 2319 /************************************************************************/ | |
| 2320 | |
| 853 | 2321 /* This exists only for debugging purposes, as a place to put a breakpoint |
| 2322 that won't get signalled for errors occurring when | |
| 2323 call_with_suspended_errors() was invoked. */ | |
| 2324 | |
| 872 | 2325 /* Don't make static or it might be compiled away */ |
| 2326 void signal_1 (void); | |
| 2327 | |
| 2328 void | |
| 853 | 2329 signal_1 (void) |
| 2330 { | |
| 2331 } | |
| 2332 | |
| 428 | 2333 /* #### This function has not been synched with FSF. It diverges |
| 2334 significantly. */ | |
| 2335 | |
| 853 | 2336 /* The simplest external error function: it would be called |
| 2337 signal_continuable_error() in the terminology below, but it's | |
| 2338 Lisp-callable. */ | |
| 2339 | |
| 2340 DEFUN ("signal", Fsignal, 2, 2, 0, /* | |
| 2341 Signal a continuable error. Args are ERROR-SYMBOL, and associated DATA. | |
| 2342 An error symbol is a symbol defined using `define-error'. | |
| 2343 DATA should be a list. Its elements are printed as part of the error message. | |
| 2344 If the signal is handled, DATA is made available to the handler. | |
| 2345 See also the function `signal-error', and the functions to handle errors: | |
| 2346 `condition-case' and `call-with-condition-handler'. | |
| 2347 | |
| 2348 Note that this function can return, if the debugger is invoked and the | |
| 2349 user invokes the "return from signal" option. | |
| 2350 */ | |
| 2351 (error_symbol, data)) | |
| 428 | 2352 { |
| 2353 /* This function can GC */ | |
| 853 | 2354 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 2355 Lisp_Object conditions = Qnil; | |
| 2356 Lisp_Object handlers = Qnil; | |
| 428 | 2357 /* signal_call_debugger() could get called more than once |
| 2358 (once when a call-with-condition-handler is about to | |
| 2359 be dealt with, and another when a condition-case handler | |
| 2360 is about to be invoked). So make sure the debugger and/or | |
| 2361 stack trace aren't done more than once. */ | |
| 2362 int stack_trace_displayed = 0; | |
| 2363 int debugger_entered = 0; | |
| 853 | 2364 |
| 2365 /* Fsignal() is one of these functions that's called all the time | |
| 2366 with newly-created Lisp objects. We allow this; but we must GC- | |
| 2367 protect the objects because all sorts of weird stuff could | |
| 2368 happen. */ | |
| 2369 | |
| 2370 GCPRO4 (conditions, handlers, error_symbol, data); | |
| 2371 | |
| 2372 if (!(inhibit_flags & CALL_WITH_SUSPENDED_ERRORS)) | |
| 2373 signal_1 (); | |
| 428 | 2374 |
| 2375 if (!initialized) | |
| 2376 { | |
| 2377 /* who knows how much has been initialized? Safest bet is | |
| 2378 just to bomb out immediately. */ | |
| 771 | 2379 stderr_out ("Error before initialization is complete!\n"); |
| 2500 | 2380 ABORT (); |
| 428 | 2381 } |
| 2382 | |
| 3092 | 2383 #ifndef NEW_GC |
| 1123 | 2384 assert (!gc_in_progress); |
| 3092 | 2385 #endif /* not NEW_GC */ |
| 1123 | 2386 |
| 2387 /* We abort if in_display and we are not protected, as garbage | |
| 2388 collections and non-local exits will invariably be fatal, but in | |
| 2389 messy, difficult-to-debug ways. See enter_redisplay_critical_section(). | |
| 2390 */ | |
| 2391 | |
| 1318 | 2392 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 1123 | 2393 check_proper_critical_section_nonlocal_exit_protection (); |
| 1318 | 2394 #endif |
| 428 | 2395 |
| 853 | 2396 conditions = Fget (error_symbol, Qerror_conditions, Qnil); |
| 428 | 2397 |
| 2398 for (handlers = Vcondition_handlers; | |
| 2399 CONSP (handlers); | |
| 2400 handlers = XCDR (handlers)) | |
| 2401 { | |
| 2402 Lisp_Object handler_fun = XCAR (XCAR (handlers)); | |
| 2403 Lisp_Object handler_data = XCDR (XCAR (handlers)); | |
| 2404 Lisp_Object outer_handlers = XCDR (handlers); | |
| 2405 | |
| 2406 if (!UNBOUNDP (handler_fun)) | |
| 2407 { | |
| 2408 /* call-with-condition-handler */ | |
| 2409 Lisp_Object tem; | |
| 2410 Lisp_Object all_handlers = Vcondition_handlers; | |
| 2411 struct gcpro ngcpro1; | |
| 2412 NGCPRO1 (all_handlers); | |
| 2413 Vcondition_handlers = outer_handlers; | |
| 2414 | |
| 853 | 2415 tem = signal_call_debugger (conditions, error_symbol, data, |
| 428 | 2416 outer_handlers, 1, |
| 2417 &stack_trace_displayed, | |
| 2418 &debugger_entered); | |
| 2419 if (!UNBOUNDP (tem)) | |
| 2420 RETURN_NUNGCPRO (return_from_signal (tem)); | |
| 2421 | |
| 853 | 2422 if (OPAQUE_PTRP (handler_fun)) |
| 2423 { | |
| 2424 if (NILP (handler_data)) | |
| 2425 { | |
| 2426 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object) = | |
| 2427 (Lisp_Object (*) (Lisp_Object, Lisp_Object)) | |
| 2428 (get_opaque_ptr (handler_fun)); | |
| 2429 | |
| 2430 tem = (*hfun) (error_symbol, data); | |
| 2431 } | |
| 2432 else | |
| 2433 { | |
| 2434 Lisp_Object (*hfun) (Lisp_Object, Lisp_Object, Lisp_Object) = | |
| 2435 (Lisp_Object (*) (Lisp_Object, Lisp_Object, Lisp_Object)) | |
| 2436 (get_opaque_ptr (handler_fun)); | |
| 2437 | |
| 2438 assert (NILP (XCDR (handler_data))); | |
| 2439 tem = (*hfun) (error_symbol, data, XCAR (handler_data)); | |
| 2440 } | |
| 2441 } | |
| 2442 else | |
| 2443 { | |
| 2444 tem = Fcons (error_symbol, data); | |
| 2445 if (NILP (handler_data)) | |
| 2446 tem = call1 (handler_fun, tem); | |
| 2447 else | |
| 2448 { | |
| 2449 /* (This code won't be used (for now?).) */ | |
| 2450 struct gcpro nngcpro1; | |
| 2451 Lisp_Object args[3]; | |
| 2452 NNGCPRO1 (args[0]); | |
| 2453 nngcpro1.nvars = 3; | |
| 2454 args[0] = handler_fun; | |
| 2455 args[1] = tem; | |
| 2456 args[2] = handler_data; | |
| 2457 nngcpro1.var = args; | |
| 2458 tem = Fapply (3, args); | |
| 2459 NNUNGCPRO; | |
| 2460 } | |
| 2461 } | |
| 428 | 2462 NUNGCPRO; |
| 2463 #if 0 | |
| 2464 if (!EQ (tem, Qsignal)) | |
| 2465 return return_from_signal (tem); | |
| 2466 #endif | |
| 2467 /* If handler didn't throw, try another handler */ | |
| 2468 Vcondition_handlers = all_handlers; | |
| 2469 } | |
| 2470 | |
| 2471 /* It's a condition-case handler */ | |
| 2472 | |
| 2473 /* t is used by handlers for all conditions, set up by C code. | |
| 2474 * debugger is not called even if debug_on_error */ | |
| 2475 else if (EQ (handler_data, Qt)) | |
| 2476 { | |
| 2477 UNGCPRO; | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
2478 throw_or_bomb_out (handlers, Fcons (error_symbol, data), |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
2479 0, Qnil, Qnil); |
| 428 | 2480 } |
| 2481 /* `error' is used similarly to the way `t' is used, but in | |
| 2482 addition it invokes the debugger if debug_on_error. | |
| 2483 This is normally used for the outer command-loop error | |
| 2484 handler. */ | |
| 2485 else if (EQ (handler_data, Qerror)) | |
| 2486 { | |
| 853 | 2487 Lisp_Object tem = signal_call_debugger (conditions, error_symbol, |
| 2488 data, | |
| 428 | 2489 outer_handlers, 0, |
| 2490 &stack_trace_displayed, | |
| 2491 &debugger_entered); | |
| 2492 | |
| 2493 UNGCPRO; | |
| 2494 if (!UNBOUNDP (tem)) | |
| 2495 return return_from_signal (tem); | |
| 2496 | |
| 853 | 2497 tem = Fcons (error_symbol, data); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
2498 throw_or_bomb_out (handlers, tem, 0, Qnil, Qnil); |
| 428 | 2499 } |
| 2500 else | |
| 2501 { | |
| 2502 /* handler established by real (Lisp) condition-case */ | |
| 2503 Lisp_Object h; | |
| 2504 | |
| 2505 for (h = handler_data; CONSP (h); h = Fcdr (h)) | |
| 2506 { | |
| 2507 Lisp_Object clause = Fcar (h); | |
| 2508 Lisp_Object tem = Fcar (clause); | |
| 2509 | |
| 2510 if (condition_type_p (tem, conditions)) | |
| 2511 { | |
| 853 | 2512 tem = signal_call_debugger (conditions, error_symbol, data, |
| 428 | 2513 outer_handlers, 1, |
| 2514 &stack_trace_displayed, | |
| 2515 &debugger_entered); | |
| 2516 UNGCPRO; | |
| 2517 if (!UNBOUNDP (tem)) | |
| 2518 return return_from_signal (tem); | |
| 2519 | |
| 2520 /* Doesn't return */ | |
| 853 | 2521 tem = Fcons (Fcons (error_symbol, data), Fcdr (clause)); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
2522 throw_or_bomb_out (handlers, tem, 0, Qnil, Qnil); |
| 428 | 2523 } |
| 2524 } | |
| 2525 } | |
| 2526 } | |
| 2527 | |
| 2528 /* If no handler is present now, try to run the debugger, | |
| 2529 and if that fails, throw to top level. | |
| 2530 | |
| 2531 #### The only time that no handler is present is during | |
| 2532 temacs or perhaps very early in XEmacs. In both cases, | |
| 3025 | 2533 there is no `top-level' catch. (That's why the |
| 428 | 2534 "bomb-out" hack was added.) |
| 2535 | |
| 853 | 2536 [[#### Fix this horrifitude!]] |
| 2537 | |
| 2538 I don't think this is horrifitude, but just defensive coding. --ben */ | |
| 2539 | |
| 2540 signal_call_debugger (conditions, error_symbol, data, Qnil, 0, | |
| 428 | 2541 &stack_trace_displayed, |
| 2542 &debugger_entered); | |
| 2543 UNGCPRO; | |
| 853 | 2544 throw_or_bomb_out (Qtop_level, Qt, 1, error_symbol, |
| 2545 data); /* Doesn't return */ | |
| 2268 | 2546 RETURN_NOT_REACHED (Qnil); |
| 428 | 2547 } |
| 2548 | |
| 2549 /****************** Error functions class 1 ******************/ | |
| 2550 | |
| 2551 /* Class 1: General functions that signal an error. | |
| 2552 These functions take an error type and a list of associated error | |
| 2553 data. */ | |
| 2554 | |
| 853 | 2555 /* No signal_continuable_error_1(); it's called Fsignal(). */ |
| 428 | 2556 |
| 2557 /* Signal a non-continuable error. */ | |
| 2558 | |
| 2559 DOESNT_RETURN | |
| 563 | 2560 signal_error_1 (Lisp_Object sig, Lisp_Object data) |
| 428 | 2561 { |
| 2562 for (;;) | |
| 2563 Fsignal (sig, data); | |
| 2564 } | |
| 853 | 2565 |
| 2566 #ifdef ERROR_CHECK_CATCH | |
| 2567 | |
| 2568 void | |
| 2569 check_catchlist_sanity (void) | |
| 2570 { | |
| 2571 #if 0 | |
| 2572 /* vou me tomar no cu! i just masked andy's missing-unbind | |
| 2573 bug! */ | |
| 442 | 2574 struct catchtag *c; |
| 2575 int found_error_tag = 0; | |
| 2576 | |
| 2577 for (c = catchlist; c; c = c->next) | |
| 2578 { | |
| 2579 if (EQ (c->tag, Qunbound_suspended_errors_tag)) | |
| 2580 { | |
| 2581 found_error_tag = 1; | |
| 2582 break; | |
| 2583 } | |
| 2584 } | |
| 2585 | |
| 2586 assert (found_error_tag || NILP (Vcurrent_error_state)); | |
| 853 | 2587 #endif /* vou me tomar no cul */ |
| 2588 } | |
| 2589 | |
| 2590 void | |
| 2591 check_specbind_stack_sanity (void) | |
| 2592 { | |
| 2593 } | |
| 2594 | |
| 2595 #endif /* ERROR_CHECK_CATCH */ | |
| 428 | 2596 |
| 2597 /* Signal a non-continuable error or display a warning or do nothing, | |
| 2598 according to ERRB. CLASS is the class of warning and should | |
| 2599 refer to what sort of operation is being done (e.g. Qtoolbar, | |
| 2600 Qresource, etc.). */ | |
| 2601 | |
| 2602 void | |
| 1204 | 2603 maybe_signal_error_1 (Lisp_Object sig, Lisp_Object data, Lisp_Object class_, |
| 578 | 2604 Error_Behavior errb) |
| 428 | 2605 { |
| 2606 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2607 return; | |
| 793 | 2608 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) |
| 1204 | 2609 warn_when_safe_lispobj (class_, Qdebug, Fcons (sig, data)); |
| 428 | 2610 else if (ERRB_EQ (errb, ERROR_ME_WARN)) |
| 1204 | 2611 warn_when_safe_lispobj (class_, Qwarning, Fcons (sig, data)); |
| 428 | 2612 else |
| 2613 for (;;) | |
| 2614 Fsignal (sig, data); | |
| 2615 } | |
| 2616 | |
| 2617 /* Signal a continuable error or display a warning or do nothing, | |
| 2618 according to ERRB. */ | |
| 2619 | |
| 2620 Lisp_Object | |
| 563 | 2621 maybe_signal_continuable_error_1 (Lisp_Object sig, Lisp_Object data, |
| 1204 | 2622 Lisp_Object class_, Error_Behavior errb) |
| 428 | 2623 { |
| 2624 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2625 return Qnil; | |
| 793 | 2626 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) |
| 2627 { | |
| 1204 | 2628 warn_when_safe_lispobj (class_, Qdebug, Fcons (sig, data)); |
| 793 | 2629 return Qnil; |
| 2630 } | |
| 428 | 2631 else if (ERRB_EQ (errb, ERROR_ME_WARN)) |
| 2632 { | |
| 1204 | 2633 warn_when_safe_lispobj (class_, Qwarning, Fcons (sig, data)); |
| 428 | 2634 return Qnil; |
| 2635 } | |
| 2636 else | |
| 2637 return Fsignal (sig, data); | |
| 2638 } | |
| 2639 | |
| 2640 | |
| 2641 /****************** Error functions class 2 ******************/ | |
| 2642 | |
| 563 | 2643 /* Class 2: Signal an error with a string and an associated object. |
| 2644 Normally these functions are used to attach one associated object, | |
| 2645 but to attach no objects, specify Qunbound for FROB, and for more | |
| 2646 than one object, make a list of the objects with Qunbound as the | |
| 2647 first element. (If you have specifically two objects to attach, | |
| 2648 consider using the function in class 3 below.) These functions | |
| 2649 signal an error of a specified type, whose data is one or more | |
| 2650 objects (usually two), a string the related Lisp object(s) | |
| 2651 specified as FROB. */ | |
| 2652 | |
| 2653 /* Out of REASON and FROB, return a list of elements suitable for passing | |
| 2654 to signal_error_1(). */ | |
| 2655 | |
| 2656 Lisp_Object | |
| 867 | 2657 build_error_data (const CIbyte *reason, Lisp_Object frob) |
| 563 | 2658 { |
| 2659 if (EQ (frob, Qunbound)) | |
| 2660 frob = Qnil; | |
| 2661 else if (CONSP (frob) && EQ (XCAR (frob), Qunbound)) | |
| 2662 frob = XCDR (frob); | |
| 2663 else | |
| 2664 frob = list1 (frob); | |
| 2665 if (!reason) | |
| 2666 return frob; | |
| 2667 else | |
| 771 | 2668 return Fcons (build_msg_string (reason), frob); |
| 563 | 2669 } |
| 2670 | |
| 2671 DOESNT_RETURN | |
| 867 | 2672 signal_error (Lisp_Object type, const CIbyte *reason, Lisp_Object frob) |
| 563 | 2673 { |
| 2674 signal_error_1 (type, build_error_data (reason, frob)); | |
| 2675 } | |
| 2676 | |
| 2677 void | |
| 867 | 2678 maybe_signal_error (Lisp_Object type, const CIbyte *reason, |
| 1204 | 2679 Lisp_Object frob, Lisp_Object class_, |
| 578 | 2680 Error_Behavior errb) |
| 563 | 2681 { |
| 2682 /* Optimization: */ | |
| 2683 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2684 return; | |
| 1204 | 2685 maybe_signal_error_1 (type, build_error_data (reason, frob), class_, errb); |
| 563 | 2686 } |
| 2687 | |
| 2688 Lisp_Object | |
| 867 | 2689 signal_continuable_error (Lisp_Object type, const CIbyte *reason, |
| 563 | 2690 Lisp_Object frob) |
| 2691 { | |
| 2692 return Fsignal (type, build_error_data (reason, frob)); | |
| 2693 } | |
| 2694 | |
| 2695 Lisp_Object | |
| 867 | 2696 maybe_signal_continuable_error (Lisp_Object type, const CIbyte *reason, |
| 1204 | 2697 Lisp_Object frob, Lisp_Object class_, |
| 578 | 2698 Error_Behavior errb) |
| 563 | 2699 { |
| 2700 /* Optimization: */ | |
| 2701 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2702 return Qnil; | |
| 2703 return maybe_signal_continuable_error_1 (type, | |
| 2704 build_error_data (reason, frob), | |
| 1204 | 2705 class_, errb); |
| 563 | 2706 } |
| 2707 | |
| 2708 | |
| 2709 /****************** Error functions class 3 ******************/ | |
| 2710 | |
| 2711 /* Class 3: Signal an error with a string and two associated objects. | |
| 2712 These functions signal an error of a specified type, whose data | |
| 2713 is three objects, a string and two related Lisp objects. | |
| 2714 (The equivalent could be accomplished using the class 2 functions, | |
| 2715 but these are more convenient in this particular case.) */ | |
| 2716 | |
| 2717 DOESNT_RETURN | |
| 867 | 2718 signal_error_2 (Lisp_Object type, const CIbyte *reason, |
| 563 | 2719 Lisp_Object frob0, Lisp_Object frob1) |
| 2720 { | |
| 771 | 2721 signal_error_1 (type, list3 (build_msg_string (reason), frob0, |
| 563 | 2722 frob1)); |
| 2723 } | |
| 2724 | |
| 2725 void | |
| 867 | 2726 maybe_signal_error_2 (Lisp_Object type, const CIbyte *reason, |
| 563 | 2727 Lisp_Object frob0, Lisp_Object frob1, |
| 1204 | 2728 Lisp_Object class_, Error_Behavior errb) |
| 563 | 2729 { |
| 2730 /* Optimization: */ | |
| 2731 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2732 return; | |
| 771 | 2733 maybe_signal_error_1 (type, list3 (build_msg_string (reason), frob0, |
| 1204 | 2734 frob1), class_, errb); |
| 563 | 2735 } |
| 2736 | |
| 2737 Lisp_Object | |
| 867 | 2738 signal_continuable_error_2 (Lisp_Object type, const CIbyte *reason, |
| 563 | 2739 Lisp_Object frob0, Lisp_Object frob1) |
| 2740 { | |
| 771 | 2741 return Fsignal (type, list3 (build_msg_string (reason), frob0, |
| 563 | 2742 frob1)); |
| 2743 } | |
| 2744 | |
| 2745 Lisp_Object | |
| 867 | 2746 maybe_signal_continuable_error_2 (Lisp_Object type, const CIbyte *reason, |
| 563 | 2747 Lisp_Object frob0, Lisp_Object frob1, |
| 1204 | 2748 Lisp_Object class_, Error_Behavior errb) |
| 563 | 2749 { |
| 2750 /* Optimization: */ | |
| 2751 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2752 return Qnil; | |
| 2753 return maybe_signal_continuable_error_1 | |
| 771 | 2754 (type, list3 (build_msg_string (reason), frob0, frob1), |
| 1204 | 2755 class_, errb); |
| 563 | 2756 } |
| 2757 | |
| 2758 | |
| 2759 /****************** Error functions class 4 ******************/ | |
| 2760 | |
| 2761 /* Class 4: Printf-like functions that signal an error. | |
| 442 | 2762 These functions signal an error of a specified type, whose data |
| 428 | 2763 is a single string, created using the arguments. */ |
| 2764 | |
| 2765 DOESNT_RETURN | |
| 867 | 2766 signal_ferror (Lisp_Object type, const CIbyte *fmt, ...) |
| 442 | 2767 { |
| 2768 Lisp_Object obj; | |
| 2769 va_list args; | |
| 2770 | |
| 2771 va_start (args, fmt); | |
| 771 | 2772 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 442 | 2773 va_end (args); |
| 2774 | |
| 2775 /* Fsignal GC-protects its args */ | |
| 563 | 2776 signal_error (type, 0, obj); |
| 442 | 2777 } |
| 2778 | |
| 2779 void | |
| 1204 | 2780 maybe_signal_ferror (Lisp_Object type, Lisp_Object class_, Error_Behavior errb, |
| 867 | 2781 const CIbyte *fmt, ...) |
| 442 | 2782 { |
| 2783 Lisp_Object obj; | |
| 2784 va_list args; | |
| 2785 | |
| 2786 /* Optimization: */ | |
| 2787 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2788 return; | |
| 2789 | |
| 2790 va_start (args, fmt); | |
| 771 | 2791 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 442 | 2792 va_end (args); |
| 2793 | |
| 2794 /* Fsignal GC-protects its args */ | |
| 1204 | 2795 maybe_signal_error (type, 0, obj, class_, errb); |
| 442 | 2796 } |
| 2797 | |
| 2798 Lisp_Object | |
| 867 | 2799 signal_continuable_ferror (Lisp_Object type, const CIbyte *fmt, ...) |
| 428 | 2800 { |
| 2801 Lisp_Object obj; | |
| 2802 va_list args; | |
| 2803 | |
| 2804 va_start (args, fmt); | |
| 771 | 2805 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 442 | 2806 va_end (args); |
| 2807 | |
| 2808 /* Fsignal GC-protects its args */ | |
| 2809 return Fsignal (type, list1 (obj)); | |
| 2810 } | |
| 2811 | |
| 2812 Lisp_Object | |
| 1204 | 2813 maybe_signal_continuable_ferror (Lisp_Object type, Lisp_Object class_, |
| 867 | 2814 Error_Behavior errb, const CIbyte *fmt, ...) |
| 442 | 2815 { |
| 2816 Lisp_Object obj; | |
| 2817 va_list args; | |
| 2818 | |
| 2819 /* Optimization: */ | |
| 2820 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2821 return Qnil; | |
| 2822 | |
| 2823 va_start (args, fmt); | |
| 771 | 2824 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 442 | 2825 va_end (args); |
| 2826 | |
| 2827 /* Fsignal GC-protects its args */ | |
| 1204 | 2828 return maybe_signal_continuable_error (type, 0, obj, class_, errb); |
| 442 | 2829 } |
| 2830 | |
| 2831 | |
| 2832 /****************** Error functions class 5 ******************/ | |
| 2833 | |
| 563 | 2834 /* Class 5: Printf-like functions that signal an error. |
| 442 | 2835 These functions signal an error of a specified type, whose data |
| 563 | 2836 is a one or more objects, a string (created using the arguments) |
| 2837 and additional Lisp objects specified in FROB. (The syntax of FROB | |
| 2838 is the same as for class 2.) | |
| 2839 | |
| 2840 There is no need for a class 6 because you can always attach 2 | |
| 2841 objects using class 5 (for FROB, specify a list with three | |
| 2842 elements, the first of which is Qunbound), and these functions are | |
| 2843 not commonly used. | |
| 2844 */ | |
| 442 | 2845 |
| 2846 DOESNT_RETURN | |
| 867 | 2847 signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob, const CIbyte *fmt, |
| 563 | 2848 ...) |
| 442 | 2849 { |
| 2850 Lisp_Object obj; | |
| 2851 va_list args; | |
| 2852 | |
| 2853 va_start (args, fmt); | |
| 771 | 2854 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 442 | 2855 va_end (args); |
| 2856 | |
| 2857 /* Fsignal GC-protects its args */ | |
| 563 | 2858 signal_error_1 (type, Fcons (obj, build_error_data (0, frob))); |
| 442 | 2859 } |
| 2860 | |
| 2861 void | |
| 563 | 2862 maybe_signal_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
| 1204 | 2863 Lisp_Object class_, Error_Behavior errb, |
| 867 | 2864 const CIbyte *fmt, ...) |
| 442 | 2865 { |
| 2866 Lisp_Object obj; | |
| 2867 va_list args; | |
| 2868 | |
| 2869 /* Optimization: */ | |
| 2870 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2871 return; | |
| 2872 | |
| 2873 va_start (args, fmt); | |
| 771 | 2874 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 428 | 2875 va_end (args); |
| 2876 | |
| 2877 /* Fsignal GC-protects its args */ | |
| 1204 | 2878 maybe_signal_error_1 (type, Fcons (obj, build_error_data (0, frob)), class_, |
| 563 | 2879 errb); |
| 428 | 2880 } |
| 2881 | |
| 2882 Lisp_Object | |
| 563 | 2883 signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
| 867 | 2884 const CIbyte *fmt, ...) |
| 428 | 2885 { |
| 2886 Lisp_Object obj; | |
| 2887 va_list args; | |
| 2888 | |
| 2889 va_start (args, fmt); | |
| 771 | 2890 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 428 | 2891 va_end (args); |
| 2892 | |
| 2893 /* Fsignal GC-protects its args */ | |
| 563 | 2894 return Fsignal (type, Fcons (obj, build_error_data (0, frob))); |
| 428 | 2895 } |
| 2896 | |
| 2897 Lisp_Object | |
| 563 | 2898 maybe_signal_continuable_ferror_with_frob (Lisp_Object type, Lisp_Object frob, |
| 1204 | 2899 Lisp_Object class_, |
| 578 | 2900 Error_Behavior errb, |
| 867 | 2901 const CIbyte *fmt, ...) |
| 428 | 2902 { |
| 2903 Lisp_Object obj; | |
| 2904 va_list args; | |
| 2905 | |
| 2906 /* Optimization: */ | |
| 2907 if (ERRB_EQ (errb, ERROR_ME_NOT)) | |
| 2908 return Qnil; | |
| 2909 | |
| 2910 va_start (args, fmt); | |
| 771 | 2911 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 428 | 2912 va_end (args); |
| 2913 | |
| 2914 /* Fsignal GC-protects its args */ | |
| 563 | 2915 return maybe_signal_continuable_error_1 (type, |
| 2916 Fcons (obj, | |
| 2917 build_error_data (0, frob)), | |
| 1204 | 2918 class_, errb); |
| 428 | 2919 } |
| 2920 | |
| 2921 | |
| 2922 /* This is what the QUIT macro calls to signal a quit */ | |
| 2923 void | |
| 2924 signal_quit (void) | |
| 2925 { | |
| 853 | 2926 /* This function cannot GC. GC is prohibited because most callers do |
| 2927 not expect GC occurring in QUIT. Remove this if/when that gets fixed. | |
| 2928 --ben */ | |
| 2929 | |
| 2930 int count; | |
| 2931 | |
| 428 | 2932 if (EQ (Vquit_flag, Qcritical)) |
| 2933 debug_on_quit |= 2; /* set critical bit. */ | |
| 2934 Vquit_flag = Qnil; | |
| 853 | 2935 count = begin_gc_forbidden (); |
| 428 | 2936 /* note that this is continuable. */ |
| 2937 Fsignal (Qquit, Qnil); | |
| 853 | 2938 unbind_to (count); |
| 428 | 2939 } |
| 2940 | |
| 2941 | |
| 563 | 2942 /************************ convenience error functions ***********************/ |
| 2943 | |
| 436 | 2944 Lisp_Object |
| 428 | 2945 signal_void_function_error (Lisp_Object function) |
| 2946 { | |
| 436 | 2947 return Fsignal (Qvoid_function, list1 (function)); |
| 428 | 2948 } |
| 2949 | |
| 436 | 2950 Lisp_Object |
| 428 | 2951 signal_invalid_function_error (Lisp_Object function) |
| 2952 { | |
| 436 | 2953 return Fsignal (Qinvalid_function, list1 (function)); |
| 428 | 2954 } |
| 2955 | |
| 436 | 2956 Lisp_Object |
| 428 | 2957 signal_wrong_number_of_arguments_error (Lisp_Object function, int nargs) |
| 2958 { | |
| 436 | 2959 return Fsignal (Qwrong_number_of_arguments, |
| 2960 list2 (function, make_int (nargs))); | |
| 428 | 2961 } |
| 2962 | |
| 2963 /* Used in list traversal macros for efficiency. */ | |
| 436 | 2964 DOESNT_RETURN |
| 428 | 2965 signal_malformed_list_error (Lisp_Object list) |
| 2966 { | |
| 563 | 2967 signal_error (Qmalformed_list, 0, list); |
| 428 | 2968 } |
| 2969 | |
| 436 | 2970 DOESNT_RETURN |
| 428 | 2971 signal_malformed_property_list_error (Lisp_Object list) |
| 2972 { | |
| 563 | 2973 signal_error (Qmalformed_property_list, 0, list); |
| 428 | 2974 } |
| 2975 | |
| 436 | 2976 DOESNT_RETURN |
| 428 | 2977 signal_circular_list_error (Lisp_Object list) |
| 2978 { | |
| 563 | 2979 signal_error (Qcircular_list, 0, list); |
| 428 | 2980 } |
| 2981 | |
| 436 | 2982 DOESNT_RETURN |
| 428 | 2983 signal_circular_property_list_error (Lisp_Object list) |
| 2984 { | |
| 563 | 2985 signal_error (Qcircular_property_list, 0, list); |
| 428 | 2986 } |
| 442 | 2987 |
| 2267 | 2988 /* Called from within emacs_doprnt_1, so REASON is not formatted. */ |
| 442 | 2989 DOESNT_RETURN |
| 867 | 2990 syntax_error (const CIbyte *reason, Lisp_Object frob) |
| 442 | 2991 { |
| 563 | 2992 signal_error (Qsyntax_error, reason, frob); |
| 442 | 2993 } |
| 2994 | |
| 2995 DOESNT_RETURN | |
| 867 | 2996 syntax_error_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 442 | 2997 { |
| 563 | 2998 signal_error_2 (Qsyntax_error, reason, frob1, frob2); |
| 2999 } | |
| 3000 | |
| 3001 void | |
| 867 | 3002 maybe_syntax_error (const CIbyte *reason, Lisp_Object frob, |
| 1204 | 3003 Lisp_Object class_, Error_Behavior errb) |
| 3004 { | |
| 3005 maybe_signal_error (Qsyntax_error, reason, frob, class_, errb); | |
| 563 | 3006 } |
| 3007 | |
| 3008 DOESNT_RETURN | |
| 867 | 3009 sferror (const CIbyte *reason, Lisp_Object frob) |
| 563 | 3010 { |
| 3011 signal_error (Qstructure_formation_error, reason, frob); | |
| 3012 } | |
| 3013 | |
| 3014 DOESNT_RETURN | |
| 867 | 3015 sferror_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 563 | 3016 { |
| 3017 signal_error_2 (Qstructure_formation_error, reason, frob1, frob2); | |
| 3018 } | |
| 3019 | |
| 3020 void | |
| 867 | 3021 maybe_sferror (const CIbyte *reason, Lisp_Object frob, |
| 1204 | 3022 Lisp_Object class_, Error_Behavior errb) |
| 3023 { | |
| 3024 maybe_signal_error (Qstructure_formation_error, reason, frob, class_, errb); | |
| 442 | 3025 } |
| 3026 | |
| 3027 DOESNT_RETURN | |
| 867 | 3028 invalid_argument (const CIbyte *reason, Lisp_Object frob) |
| 442 | 3029 { |
| 563 | 3030 signal_error (Qinvalid_argument, reason, frob); |
| 442 | 3031 } |
| 3032 | |
| 3033 DOESNT_RETURN | |
| 867 | 3034 invalid_argument_2 (const CIbyte *reason, Lisp_Object frob1, |
| 609 | 3035 Lisp_Object frob2) |
| 442 | 3036 { |
| 563 | 3037 signal_error_2 (Qinvalid_argument, reason, frob1, frob2); |
| 3038 } | |
| 3039 | |
| 3040 void | |
| 867 | 3041 maybe_invalid_argument (const CIbyte *reason, Lisp_Object frob, |
| 1204 | 3042 Lisp_Object class_, Error_Behavior errb) |
| 3043 { | |
| 3044 maybe_signal_error (Qinvalid_argument, reason, frob, class_, errb); | |
| 563 | 3045 } |
| 3046 | |
| 3047 DOESNT_RETURN | |
| 867 | 3048 invalid_constant (const CIbyte *reason, Lisp_Object frob) |
| 563 | 3049 { |
| 3050 signal_error (Qinvalid_constant, reason, frob); | |
| 3051 } | |
| 3052 | |
| 3053 DOESNT_RETURN | |
| 867 | 3054 invalid_constant_2 (const CIbyte *reason, Lisp_Object frob1, |
| 609 | 3055 Lisp_Object frob2) |
| 563 | 3056 { |
| 3057 signal_error_2 (Qinvalid_constant, reason, frob1, frob2); | |
| 3058 } | |
| 3059 | |
| 3060 void | |
| 867 | 3061 maybe_invalid_constant (const CIbyte *reason, Lisp_Object frob, |
| 1204 | 3062 Lisp_Object class_, Error_Behavior errb) |
| 3063 { | |
| 3064 maybe_signal_error (Qinvalid_constant, reason, frob, class_, errb); | |
| 442 | 3065 } |
| 3066 | |
| 3067 DOESNT_RETURN | |
| 867 | 3068 invalid_operation (const CIbyte *reason, Lisp_Object frob) |
| 442 | 3069 { |
| 563 | 3070 signal_error (Qinvalid_operation, reason, frob); |
| 442 | 3071 } |
| 3072 | |
| 3073 DOESNT_RETURN | |
| 867 | 3074 invalid_operation_2 (const CIbyte *reason, Lisp_Object frob1, |
| 609 | 3075 Lisp_Object frob2) |
| 442 | 3076 { |
| 563 | 3077 signal_error_2 (Qinvalid_operation, reason, frob1, frob2); |
| 3078 } | |
| 3079 | |
| 3080 void | |
| 867 | 3081 maybe_invalid_operation (const CIbyte *reason, Lisp_Object frob, |
| 1204 | 3082 Lisp_Object class_, Error_Behavior errb) |
| 3083 { | |
| 3084 maybe_signal_error (Qinvalid_operation, reason, frob, class_, errb); | |
| 442 | 3085 } |
| 3086 | |
| 3087 DOESNT_RETURN | |
| 867 | 3088 invalid_change (const CIbyte *reason, Lisp_Object frob) |
| 442 | 3089 { |
| 563 | 3090 signal_error (Qinvalid_change, reason, frob); |
| 442 | 3091 } |
| 3092 | |
| 3093 DOESNT_RETURN | |
| 867 | 3094 invalid_change_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 442 | 3095 { |
| 563 | 3096 signal_error_2 (Qinvalid_change, reason, frob1, frob2); |
| 3097 } | |
| 3098 | |
| 3099 void | |
| 867 | 3100 maybe_invalid_change (const CIbyte *reason, Lisp_Object frob, |
| 1204 | 3101 Lisp_Object class_, Error_Behavior errb) |
| 3102 { | |
| 3103 maybe_signal_error (Qinvalid_change, reason, frob, class_, errb); | |
| 563 | 3104 } |
| 3105 | |
| 3106 DOESNT_RETURN | |
| 867 | 3107 invalid_state (const CIbyte *reason, Lisp_Object frob) |
| 563 | 3108 { |
| 3109 signal_error (Qinvalid_state, reason, frob); | |
| 3110 } | |
| 3111 | |
| 3112 DOESNT_RETURN | |
| 867 | 3113 invalid_state_2 (const CIbyte *reason, Lisp_Object frob1, Lisp_Object frob2) |
| 563 | 3114 { |
| 3115 signal_error_2 (Qinvalid_state, reason, frob1, frob2); | |
| 3116 } | |
| 3117 | |
| 3118 void | |
| 867 | 3119 maybe_invalid_state (const CIbyte *reason, Lisp_Object frob, |
| 1204 | 3120 Lisp_Object class_, Error_Behavior errb) |
| 3121 { | |
| 3122 maybe_signal_error (Qinvalid_state, reason, frob, class_, errb); | |
| 563 | 3123 } |
| 3124 | |
| 3125 DOESNT_RETURN | |
| 867 | 3126 wtaerror (const CIbyte *reason, Lisp_Object frob) |
| 563 | 3127 { |
| 3128 signal_error (Qwrong_type_argument, reason, frob); | |
| 3129 } | |
| 3130 | |
| 3131 DOESNT_RETURN | |
| 867 | 3132 stack_overflow (const CIbyte *reason, Lisp_Object frob) |
| 563 | 3133 { |
| 3134 signal_error (Qstack_overflow, reason, frob); | |
| 3135 } | |
| 3136 | |
| 3137 DOESNT_RETURN | |
| 867 | 3138 out_of_memory (const CIbyte *reason, Lisp_Object frob) |
| 563 | 3139 { |
| 3140 signal_error (Qout_of_memory, reason, frob); | |
| 3141 } | |
| 3142 | |
| 3143 DOESNT_RETURN | |
| 867 | 3144 printing_unreadable_object (const CIbyte *fmt, ...) |
| 563 | 3145 { |
| 3146 Lisp_Object obj; | |
| 3147 va_list args; | |
| 3148 | |
| 3149 va_start (args, fmt); | |
| 771 | 3150 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 563 | 3151 va_end (args); |
| 3152 | |
| 3153 /* Fsignal GC-protects its args */ | |
| 3154 signal_error (Qprinting_unreadable_object, 0, obj); | |
| 442 | 3155 } |
| 3156 | |
| 428 | 3157 |
| 3158 /************************************************************************/ | |
| 3159 /* User commands */ | |
| 3160 /************************************************************************/ | |
| 3161 | |
| 3162 DEFUN ("commandp", Fcommandp, 1, 1, 0, /* | |
| 3163 Return t if FUNCTION makes provisions for interactive calling. | |
| 3164 This means it contains a description for how to read arguments to give it. | |
| 3165 The value is nil for an invalid function or a symbol with no function | |
| 3166 definition. | |
| 3167 | |
| 3168 Interactively callable functions include | |
| 3169 | |
| 3170 -- strings and vectors (treated as keyboard macros) | |
| 3171 -- lambda-expressions that contain a top-level call to `interactive' | |
| 3172 -- autoload definitions made by `autoload' with non-nil fourth argument | |
| 3173 (i.e. the interactive flag) | |
| 3174 -- compiled-function objects with a non-nil `compiled-function-interactive' | |
| 3175 value | |
| 3176 -- subrs (built-in functions) that are interactively callable | |
| 3177 | |
| 3178 Also, a symbol satisfies `commandp' if its function definition does so. | |
| 3179 */ | |
| 3180 (function)) | |
| 3181 { | |
| 3182 Lisp_Object fun = indirect_function (function, 0); | |
| 3183 | |
| 3184 if (COMPILED_FUNCTIONP (fun)) | |
| 3185 return XCOMPILED_FUNCTION (fun)->flags.interactivep ? Qt : Qnil; | |
| 3186 | |
| 3187 /* Lists may represent commands. */ | |
| 3188 if (CONSP (fun)) | |
| 3189 { | |
| 3190 Lisp_Object funcar = XCAR (fun); | |
| 3191 if (EQ (funcar, Qlambda)) | |
| 3192 return Fassq (Qinteractive, Fcdr (Fcdr (fun))); | |
| 3193 if (EQ (funcar, Qautoload)) | |
| 3194 return Fcar (Fcdr (Fcdr (Fcdr (fun)))); | |
| 3195 else | |
| 3196 return Qnil; | |
| 3197 } | |
| 3198 | |
| 3199 /* Emacs primitives are interactive if their DEFUN specifies an | |
| 3200 interactive spec. */ | |
| 3201 if (SUBRP (fun)) | |
| 3202 return XSUBR (fun)->prompt ? Qt : Qnil; | |
| 3203 | |
| 3204 /* Strings and vectors are keyboard macros. */ | |
| 3205 if (VECTORP (fun) || STRINGP (fun)) | |
| 3206 return Qt; | |
| 3207 | |
| 3208 /* Everything else (including Qunbound) is not a command. */ | |
| 3209 return Qnil; | |
| 3210 } | |
| 3211 | |
| 3212 DEFUN ("command-execute", Fcommand_execute, 1, 3, 0, /* | |
| 3213 Execute CMD as an editor command. | |
| 3214 CMD must be an object that satisfies the `commandp' predicate. | |
| 3215 Optional second arg RECORD-FLAG is as in `call-interactively'. | |
| 3216 The argument KEYS specifies the value to use instead of (this-command-keys) | |
| 3217 when reading the arguments. | |
| 3218 */ | |
| 444 | 3219 (cmd, record_flag, keys)) |
| 428 | 3220 { |
| 3221 /* This function can GC */ | |
| 3222 Lisp_Object prefixarg; | |
| 3223 Lisp_Object final = cmd; | |
| 4162 | 3224 PROFILE_DECLARE(); |
| 428 | 3225 struct console *con = XCONSOLE (Vselected_console); |
| 3226 | |
| 3227 prefixarg = con->prefix_arg; | |
| 3228 con->prefix_arg = Qnil; | |
| 3229 Vcurrent_prefix_arg = prefixarg; | |
| 3230 debug_on_next_call = 0; /* #### from FSFmacs; correct? */ | |
| 3231 | |
| 3232 if (SYMBOLP (cmd) && !NILP (Fget (cmd, Qdisabled, Qnil))) | |
| 733 | 3233 return run_hook (Qdisabled_command_hook); |
| 428 | 3234 |
| 3235 for (;;) | |
| 3236 { | |
| 3237 final = indirect_function (cmd, 1); | |
| 3238 if (CONSP (final) && EQ (Fcar (final), Qautoload)) | |
| 970 | 3239 { |
| 3240 /* do_autoload GCPROs both arguments */ | |
| 3241 do_autoload (final, cmd); | |
| 3242 } | |
| 428 | 3243 else |
| 3244 break; | |
| 3245 } | |
| 3246 | |
| 3247 if (CONSP (final) || SUBRP (final) || COMPILED_FUNCTIONP (final)) | |
| 3248 { | |
| 3249 backtrace.function = &Qcall_interactively; | |
| 3250 backtrace.args = &cmd; | |
| 3251 backtrace.nargs = 1; | |
| 3252 backtrace.evalargs = 0; | |
| 1292 | 3253 backtrace.pdlcount = specpdl_depth (); |
| 428 | 3254 backtrace.debug_on_exit = 0; |
| 1292 | 3255 backtrace.function_being_called = 0; |
| 428 | 3256 PUSH_BACKTRACE (backtrace); |
| 3257 | |
| 1292 | 3258 PROFILE_ENTER_FUNCTION (); |
| 444 | 3259 final = Fcall_interactively (cmd, record_flag, keys); |
| 1292 | 3260 PROFILE_EXIT_FUNCTION (); |
| 428 | 3261 |
| 3262 POP_BACKTRACE (backtrace); | |
| 3263 return final; | |
| 3264 } | |
| 3265 else if (STRINGP (final) || VECTORP (final)) | |
| 3266 { | |
| 3267 return Fexecute_kbd_macro (final, prefixarg); | |
| 3268 } | |
| 3269 else | |
| 3270 { | |
| 3271 Fsignal (Qwrong_type_argument, | |
| 3272 Fcons (Qcommandp, | |
| 3273 (EQ (cmd, final) | |
| 3274 ? list1 (cmd) | |
| 3275 : list2 (cmd, final)))); | |
| 3276 return Qnil; | |
| 3277 } | |
| 3278 } | |
| 3279 | |
| 3280 DEFUN ("interactive-p", Finteractive_p, 0, 0, 0, /* | |
| 3281 Return t if function in which this appears was called interactively. | |
| 3282 This means that the function was called with call-interactively (which | |
| 3283 includes being called as the binding of a key) | |
| 3284 and input is currently coming from the keyboard (not in keyboard macro). | |
| 3285 */ | |
| 3286 ()) | |
| 3287 { | |
| 3288 REGISTER struct backtrace *btp; | |
| 3289 REGISTER Lisp_Object fun; | |
| 3290 | |
| 3291 if (!INTERACTIVE) | |
| 3292 return Qnil; | |
| 3293 | |
| 3294 /* Unless the object was compiled, skip the frame of interactive-p itself | |
| 3295 (if interpreted) or the frame of byte-code (if called from a compiled | |
| 3296 function). Note that *btp->function may be a symbol pointing at a | |
| 3297 compiled function. */ | |
| 3298 btp = backtrace_list; | |
| 3299 | |
| 3300 #if 0 /* FSFmacs */ | |
| 3301 | |
| 3302 /* #### FSFmacs does the following instead. I can't figure | |
| 3303 out which one is more correct. */ | |
| 3304 /* If this isn't a byte-compiled function, there may be a frame at | |
| 3305 the top for Finteractive_p itself. If so, skip it. */ | |
| 3306 fun = Findirect_function (*btp->function); | |
| 3307 if (SUBRP (fun) && XSUBR (fun) == &Sinteractive_p) | |
| 3308 btp = btp->next; | |
| 3309 | |
| 3310 /* If we're running an Emacs 18-style byte-compiled function, there | |
| 3311 may be a frame for Fbyte_code. Now, given the strictest | |
| 3312 definition, this function isn't really being called | |
| 3313 interactively, but because that's the way Emacs 18 always builds | |
| 3314 byte-compiled functions, we'll accept it for now. */ | |
| 3315 if (EQ (*btp->function, Qbyte_code)) | |
| 3316 btp = btp->next; | |
| 3317 | |
| 3318 /* If this isn't a byte-compiled function, then we may now be | |
| 3319 looking at several frames for special forms. Skip past them. */ | |
| 3320 while (btp && | |
| 3321 btp->nargs == UNEVALLED) | |
| 3322 btp = btp->next; | |
| 3323 | |
| 3324 #else | |
| 3325 | |
| 3326 if (! (COMPILED_FUNCTIONP (Findirect_function (*btp->function)))) | |
| 3327 btp = btp->next; | |
| 3328 for (; | |
| 3329 btp && (btp->nargs == UNEVALLED | |
| 3330 || EQ (*btp->function, Qbyte_code)); | |
| 3331 btp = btp->next) | |
| 3332 {} | |
| 3333 /* btp now points at the frame of the innermost function | |
| 3334 that DOES eval its args. | |
| 3335 If it is a built-in function (such as load or eval-region) | |
| 3336 return nil. */ | |
| 3337 /* Beats me why this is necessary, but it is */ | |
| 3338 if (btp && EQ (*btp->function, Qcall_interactively)) | |
| 3339 return Qt; | |
| 3340 | |
| 3341 #endif | |
| 3342 | |
| 3343 fun = Findirect_function (*btp->function); | |
| 3344 if (SUBRP (fun)) | |
| 3345 return Qnil; | |
| 3346 /* btp points to the frame of a Lisp function that called interactive-p. | |
| 3347 Return t if that function was called interactively. */ | |
| 3348 if (btp && btp->next && EQ (*btp->next->function, Qcall_interactively)) | |
| 3349 return Qt; | |
| 3350 return Qnil; | |
| 3351 } | |
| 3352 | |
| 3353 | |
| 3354 /************************************************************************/ | |
| 3355 /* Autoloading */ | |
| 3356 /************************************************************************/ | |
| 3357 | |
| 3358 DEFUN ("autoload", Fautoload, 2, 5, 0, /* | |
| 444 | 3359 Define FUNCTION to autoload from FILENAME. |
| 3360 FUNCTION is a symbol; FILENAME is a file name string to pass to `load'. | |
| 3361 The remaining optional arguments provide additional info about the | |
| 3362 real definition. | |
| 3363 DOCSTRING is documentation for FUNCTION. | |
| 3364 INTERACTIVE, if non-nil, says FUNCTION can be called interactively. | |
| 3365 TYPE indicates the type of the object: | |
| 428 | 3366 nil or omitted says FUNCTION is a function, |
| 3367 `keymap' says FUNCTION is really a keymap, and | |
| 3368 `macro' or t says FUNCTION is really a macro. | |
| 444 | 3369 If FUNCTION already has a non-void function definition that is not an |
| 3370 autoload object, this function does nothing and returns nil. | |
| 428 | 3371 */ |
| 444 | 3372 (function, filename, docstring, interactive, type)) |
| 428 | 3373 { |
| 3374 /* This function can GC */ | |
| 3375 CHECK_SYMBOL (function); | |
| 444 | 3376 CHECK_STRING (filename); |
| 428 | 3377 |
| 3378 /* If function is defined and not as an autoload, don't override */ | |
| 3379 { | |
| 3380 Lisp_Object f = XSYMBOL (function)->function; | |
| 3381 if (!UNBOUNDP (f) && !(CONSP (f) && EQ (XCAR (f), Qautoload))) | |
| 3382 return Qnil; | |
| 3383 } | |
| 3384 | |
| 3385 if (purify_flag) | |
| 3386 { | |
| 3387 /* Attempt to avoid consing identical (string=) pure strings. */ | |
| 444 | 3388 filename = Fsymbol_name (Fintern (filename, Qnil)); |
| 428 | 3389 } |
| 440 | 3390 |
| 444 | 3391 return Ffset (function, Fcons (Qautoload, list4 (filename, |
| 428 | 3392 docstring, |
| 3393 interactive, | |
| 3394 type))); | |
| 3395 } | |
| 3396 | |
| 3397 Lisp_Object | |
| 3398 un_autoload (Lisp_Object oldqueue) | |
| 3399 { | |
| 3400 /* This function can GC */ | |
| 3401 REGISTER Lisp_Object queue, first, second; | |
| 3402 | |
| 3403 /* Queue to unwind is current value of Vautoload_queue. | |
| 3404 oldqueue is the shadowed value to leave in Vautoload_queue. */ | |
| 3405 queue = Vautoload_queue; | |
| 3406 Vautoload_queue = oldqueue; | |
| 3407 while (CONSP (queue)) | |
| 3408 { | |
| 3409 first = XCAR (queue); | |
| 3410 second = Fcdr (first); | |
| 3411 first = Fcar (first); | |
| 3412 if (NILP (second)) | |
| 3413 Vfeatures = first; | |
| 3414 else | |
| 3415 Ffset (first, second); | |
| 3416 queue = Fcdr (queue); | |
| 3417 } | |
| 3418 return Qnil; | |
| 3419 } | |
| 3420 | |
| 970 | 3421 /* do_autoload GCPROs both arguments */ |
| 428 | 3422 void |
| 3423 do_autoload (Lisp_Object fundef, | |
| 3424 Lisp_Object funname) | |
| 3425 { | |
| 3426 /* This function can GC */ | |
| 3427 int speccount = specpdl_depth(); | |
| 3428 Lisp_Object fun = funname; | |
| 970 | 3429 struct gcpro gcpro1, gcpro2, gcpro3; |
| 428 | 3430 |
| 3431 CHECK_SYMBOL (funname); | |
| 970 | 3432 GCPRO3 (fundef, funname, fun); |
| 428 | 3433 |
| 3434 /* Value saved here is to be restored into Vautoload_queue */ | |
| 3435 record_unwind_protect (un_autoload, Vautoload_queue); | |
| 3436 Vautoload_queue = Qt; | |
| 3437 call4 (Qload, Fcar (Fcdr (fundef)), Qnil, noninteractive ? Qt : Qnil, Qnil); | |
| 3438 | |
| 3439 { | |
| 3440 Lisp_Object queue; | |
| 3441 | |
| 3442 /* Save the old autoloads, in case we ever do an unload. */ | |
| 3443 for (queue = Vautoload_queue; CONSP (queue); queue = XCDR (queue)) | |
| 3444 { | |
| 3445 Lisp_Object first = XCAR (queue); | |
| 3446 Lisp_Object second = Fcdr (first); | |
| 3447 | |
| 3448 first = Fcar (first); | |
| 3449 | |
| 3450 /* Note: This test is subtle. The cdr of an autoload-queue entry | |
| 3451 may be an atom if the autoload entry was generated by a defalias | |
| 3452 or fset. */ | |
| 3453 if (CONSP (second)) | |
| 3454 Fput (first, Qautoload, (XCDR (second))); | |
| 3455 } | |
| 3456 } | |
| 3457 | |
| 3458 /* Once loading finishes, don't undo it. */ | |
| 3459 Vautoload_queue = Qt; | |
| 771 | 3460 unbind_to (speccount); |
| 428 | 3461 |
| 3462 fun = indirect_function (fun, 0); | |
| 3463 | |
| 3464 #if 0 /* FSFmacs */ | |
| 3465 if (!NILP (Fequal (fun, fundef))) | |
| 3466 #else | |
| 3467 if (UNBOUNDP (fun) | |
| 3468 || (CONSP (fun) | |
| 3469 && EQ (XCAR (fun), Qautoload))) | |
| 3470 #endif | |
| 563 | 3471 invalid_state ("Autoloading failed to define function", funname); |
| 428 | 3472 UNGCPRO; |
| 3473 } | |
| 3474 | |
| 3475 | |
| 3476 /************************************************************************/ | |
| 3477 /* eval, funcall, apply */ | |
| 3478 /************************************************************************/ | |
| 3479 | |
| 814 | 3480 /* NOTE: If you are hearing the endless complaint that function calls in |
| 3481 elisp are extremely slow, it just isn't true any more! The stuff below | |
| 3482 -- in particular, the calling of subrs and compiled functions, the most | |
| 3483 common cases -- has been highly optimized. There isn't a whole lot left | |
| 3484 to do to squeeze more speed out except by switching to lexical | |
| 3485 variables, which would eliminate the specbind loop. (But the real gain | |
| 3486 from lexical variables would come from better optimization -- with | |
| 3487 dynamic binding, you have the constant problem that any function call | |
| 3488 that you haven't explicitly proven to be side-effect-free might | |
| 3489 potentially side effect your local variables, which makes optimization | |
| 3490 extremely difficult when there are function calls anywhere in a chunk of | |
| 3491 code to be optimized. Even worse, you don't know that *your* local | |
| 3492 variables aren't side-effecting an outer function's local variables, so | |
| 3493 it's impossible to optimize away almost *any* variable assignment.) */ | |
| 3494 | |
| 428 | 3495 static Lisp_Object funcall_lambda (Lisp_Object fun, |
| 442 | 3496 int nargs, Lisp_Object args[]); |
| 428 | 3497 static int in_warnings; |
| 3498 | |
| 3499 | |
| 814 | 3500 void handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f, |
| 3501 int nargs, | |
| 3502 Lisp_Object args[]); | |
| 3503 | |
| 3504 /* The theory behind making this a separate function is to shrink | |
| 3505 funcall_compiled_function() so as to increase the likelihood of a cache | |
| 3506 hit in the L1 cache -- &rest processing is not going to be fast anyway. | |
| 3507 The idea is the same as with execute_rare_opcode() in bytecode.c. We | |
| 3508 make this non-static to ensure the compiler doesn't inline it. */ | |
| 3509 | |
| 3510 void | |
| 3511 handle_compiled_function_with_and_rest (Lisp_Compiled_Function *f, int nargs, | |
| 3512 Lisp_Object args[]) | |
| 3513 { | |
| 3514 REGISTER int i = 0; | |
| 3515 int max_non_rest_args = f->args_in_array - 1; | |
| 3516 int bindargs = min (nargs, max_non_rest_args); | |
| 3517 | |
| 3518 for (i = 0; i < bindargs; i++) | |
| 3092 | 3519 #ifdef NEW_GC |
| 3520 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3521 args[i]); | |
| 3522 #else /* not NEW_GC */ | |
| 814 | 3523 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3524 #endif /* not NEW_GC */ |
| 814 | 3525 for (i = bindargs; i < max_non_rest_args; i++) |
| 3092 | 3526 #ifdef NEW_GC |
| 3527 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3528 Qnil); | |
| 3529 #else /* not NEW_GC */ | |
| 814 | 3530 SPECBIND_FAST_UNSAFE (f->args[i], Qnil); |
| 3092 | 3531 #endif /* not NEW_GC */ |
| 3532 #ifdef NEW_GC | |
| 3533 SPECBIND_FAST_UNSAFE | |
| 3534 (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[max_non_rest_args], | |
| 3535 nargs > max_non_rest_args ? | |
| 3536 Flist (nargs - max_non_rest_args, &args[max_non_rest_args]) : | |
| 3537 Qnil); | |
| 3538 #else /* not NEW_GC */ | |
| 814 | 3539 SPECBIND_FAST_UNSAFE |
| 3540 (f->args[max_non_rest_args], | |
| 3541 nargs > max_non_rest_args ? | |
| 3542 Flist (nargs - max_non_rest_args, &args[max_non_rest_args]) : | |
| 3543 Qnil); | |
| 3092 | 3544 #endif /* not NEW_GC */ |
| 814 | 3545 } |
| 3546 | |
| 3547 /* Apply compiled-function object FUN to the NARGS evaluated arguments | |
| 3548 in ARGS, and return the result of evaluation. */ | |
| 3549 inline static Lisp_Object | |
| 3550 funcall_compiled_function (Lisp_Object fun, int nargs, Lisp_Object args[]) | |
| 3551 { | |
| 3552 /* This function can GC */ | |
| 3553 int speccount = specpdl_depth(); | |
| 3554 REGISTER int i = 0; | |
| 3555 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (fun); | |
| 3556 | |
| 3557 if (!OPAQUEP (f->instructions)) | |
| 3558 /* Lazily munge the instructions into a more efficient form */ | |
| 3559 optimize_compiled_function (fun); | |
| 3560 | |
| 3561 /* optimize_compiled_function() guaranteed that f->specpdl_depth is | |
| 3562 the required space on the specbinding stack for binding the args | |
| 3563 and local variables of fun. So just reserve it once. */ | |
| 3564 SPECPDL_RESERVE (f->specpdl_depth); | |
| 3565 | |
| 3566 if (nargs == f->max_args) /* Optimize for the common case -- no unspecified | |
| 3567 optional arguments. */ | |
| 3568 { | |
| 3569 #if 1 | |
| 3570 for (i = 0; i < nargs; i++) | |
| 3092 | 3571 #ifdef NEW_GC |
| 3572 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3573 args[i]); | |
| 3574 #else /* not NEW_GC */ | |
| 814 | 3575 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3576 #endif /* not NEW_GC */ |
| 814 | 3577 #else |
| 3578 /* Here's an alternate way to write the loop that tries to further | |
| 3579 optimize funcalls for functions with few arguments by partially | |
| 3580 unrolling the loop. It's not clear whether this is a win since it | |
| 3581 increases the size of the function and the possibility of L1 cache | |
| 3582 misses. (Microsoft VC++ 6 with /O2 /G5 generates 0x90 == 144 bytes | |
| 3583 per SPECBIND_FAST_UNSAFE().) Tests under VC++ 6, running the byte | |
| 3584 compiler repeatedly and looking at the total time, show very | |
| 3585 little difference between the simple loop above, the unrolled code | |
| 3586 below, and a "partly unrolled" solution with only cases 0-2 below | |
| 3587 instead of 0-4. Therefore, I'm keeping it at the simple loop | |
| 3588 because it's smaller. */ | |
| 3589 switch (nargs) | |
| 3590 { | |
| 3591 default: | |
| 3592 for (i = nargs - 1; i >= 4; i--) | |
| 3593 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); | |
| 3594 case 4: SPECBIND_FAST_UNSAFE (f->args[3], args[3]); | |
| 3595 case 3: SPECBIND_FAST_UNSAFE (f->args[2], args[2]); | |
| 3596 case 2: SPECBIND_FAST_UNSAFE (f->args[1], args[1]); | |
| 3597 case 1: SPECBIND_FAST_UNSAFE (f->args[0], args[0]); | |
| 3598 case 0: break; | |
| 3599 } | |
| 3600 #endif | |
| 3601 } | |
| 3602 else if (nargs < f->min_args) | |
| 3603 goto wrong_number_of_arguments; | |
| 3604 else if (nargs < f->max_args) | |
| 3605 { | |
| 3606 for (i = 0; i < nargs; i++) | |
| 3092 | 3607 #ifdef NEW_GC |
| 3608 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3609 args[i]); | |
| 3610 #else /* not NEW_GC */ | |
| 814 | 3611 SPECBIND_FAST_UNSAFE (f->args[i], args[i]); |
| 3092 | 3612 #endif /* not NEW_GC */ |
| 814 | 3613 for (i = nargs; i < f->max_args; i++) |
| 3092 | 3614 #ifdef NEW_GC |
| 3615 SPECBIND_FAST_UNSAFE (XCOMPILED_FUNCTION_ARGS_DATA (f->arguments)[i], | |
| 3616 Qnil); | |
| 3617 #else /* not NEW_GC */ | |
| 814 | 3618 SPECBIND_FAST_UNSAFE (f->args[i], Qnil); |
| 3092 | 3619 #endif /* not NEW_GC */ |
| 814 | 3620 } |
| 3621 else if (f->max_args == MANY) | |
| 3622 handle_compiled_function_with_and_rest (f, nargs, args); | |
| 3623 else | |
| 3624 { | |
| 3625 wrong_number_of_arguments: | |
| 3626 /* The actual printed compiled_function object is incomprehensible. | |
| 3627 Check the backtrace to see if we can get a more meaningful symbol. */ | |
| 3628 if (EQ (fun, indirect_function (*backtrace_list->function, 0))) | |
| 3629 fun = *backtrace_list->function; | |
| 3630 return Fsignal (Qwrong_number_of_arguments, | |
| 3631 list2 (fun, make_int (nargs))); | |
| 3632 } | |
| 3633 | |
| 3634 { | |
| 3635 Lisp_Object value = | |
| 3636 execute_optimized_program ((Opbyte *) XOPAQUE_DATA (f->instructions), | |
| 3637 f->stack_depth, | |
| 3638 XVECTOR_DATA (f->constants)); | |
| 3639 | |
| 3640 /* The attempt to optimize this by only unbinding variables failed | |
| 3641 because using buffer-local variables as function parameters | |
| 3642 leads to specpdl_ptr->func != 0 */ | |
| 3643 /* UNBIND_TO_GCPRO_VARIABLES_ONLY (speccount, value); */ | |
| 3644 UNBIND_TO_GCPRO (speccount, value); | |
| 3645 return value; | |
| 3646 } | |
| 3647 } | |
| 3648 | |
| 428 | 3649 DEFUN ("eval", Feval, 1, 1, 0, /* |
| 3650 Evaluate FORM and return its value. | |
| 3651 */ | |
| 3652 (form)) | |
| 3653 { | |
| 3654 /* This function can GC */ | |
| 3655 Lisp_Object fun, val, original_fun, original_args; | |
| 3656 int nargs; | |
| 4162 | 3657 PROFILE_DECLARE(); |
| 428 | 3658 |
| 1318 | 3659 #ifdef ERROR_CHECK_TRAPPING_PROBLEMS |
| 3660 check_proper_critical_section_lisp_protection (); | |
| 3661 #endif | |
| 3662 | |
| 3989 | 3663 if (!CONSP (form)) |
| 3664 { | |
| 3665 if (SYMBOLP (form)) | |
| 3666 { | |
| 3667 return Fsymbol_value (form); | |
| 3668 } | |
| 3669 | |
| 3670 return form; | |
| 3671 } | |
| 3672 | |
| 428 | 3673 /* I think this is a pretty safe place to call Lisp code, don't you? */ |
| 853 | 3674 while (!in_warnings && !NILP (Vpending_warnings) |
| 3675 /* well, perhaps not so safe after all! */ | |
| 3676 && !(inhibit_flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY)) | |
| 428 | 3677 { |
| 3678 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; | |
| 1204 | 3679 Lisp_Object this_warning_cons, this_warning, class_, level, messij; |
| 853 | 3680 int speccount = internal_bind_int (&in_warnings, 1); |
| 3681 | |
| 428 | 3682 this_warning_cons = Vpending_warnings; |
| 3683 this_warning = XCAR (this_warning_cons); | |
| 3684 /* in case an error occurs in the warn function, at least | |
| 3685 it won't happen infinitely */ | |
| 3686 Vpending_warnings = XCDR (Vpending_warnings); | |
| 853 | 3687 free_cons (this_warning_cons); |
| 1204 | 3688 class_ = XCAR (this_warning); |
| 428 | 3689 level = XCAR (XCDR (this_warning)); |
| 3690 messij = XCAR (XCDR (XCDR (this_warning))); | |
| 3691 free_list (this_warning); | |
| 3692 | |
| 3693 if (NILP (Vpending_warnings)) | |
| 3694 Vpending_warnings_tail = Qnil; /* perhaps not strictly necessary, | |
| 3695 but safer */ | |
| 3696 | |
| 1204 | 3697 GCPRO4 (form, class_, level, messij); |
| 428 | 3698 if (!STRINGP (messij)) |
| 3699 messij = Fprin1_to_string (messij, Qnil); | |
| 1204 | 3700 call3 (Qdisplay_warning, class_, messij, level); |
| 428 | 3701 UNGCPRO; |
| 771 | 3702 unbind_to (speccount); |
| 428 | 3703 } |
| 3704 | |
| 3705 QUIT; | |
| 814 | 3706 if (need_to_garbage_collect) |
| 428 | 3707 { |
| 3708 struct gcpro gcpro1; | |
| 3709 GCPRO1 (form); | |
| 3092 | 3710 #ifdef NEW_GC |
| 3711 gc_incremental (); | |
| 3712 #else /* not NEW_GC */ | |
| 428 | 3713 garbage_collect_1 (); |
| 3092 | 3714 #endif /* not NEW_GC */ |
| 428 | 3715 UNGCPRO; |
| 3716 } | |
| 3717 | |
| 3718 if (++lisp_eval_depth > max_lisp_eval_depth) | |
| 3719 { | |
| 3720 if (max_lisp_eval_depth < 100) | |
| 3721 max_lisp_eval_depth = 100; | |
| 3722 if (lisp_eval_depth > max_lisp_eval_depth) | |
| 563 | 3723 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'", |
| 3724 Qunbound); | |
| 428 | 3725 } |
| 3726 | |
| 3727 /* We guaranteed CONSP (form) above */ | |
| 3728 original_fun = XCAR (form); | |
| 3729 original_args = XCDR (form); | |
| 3730 | |
| 3731 GET_EXTERNAL_LIST_LENGTH (original_args, nargs); | |
| 3732 | |
| 3733 backtrace.pdlcount = specpdl_depth(); | |
| 3734 backtrace.function = &original_fun; /* This also protects them from gc */ | |
| 3735 backtrace.args = &original_args; | |
| 3736 backtrace.nargs = UNEVALLED; | |
| 3737 backtrace.evalargs = 1; | |
| 3738 backtrace.debug_on_exit = 0; | |
| 1292 | 3739 backtrace.function_being_called = 0; |
| 428 | 3740 PUSH_BACKTRACE (backtrace); |
| 3741 | |
| 3742 if (debug_on_next_call) | |
| 3743 do_debug_on_call (Qt); | |
| 3744 | |
| 3745 /* At this point, only original_fun and original_args | |
| 3746 have values that will be used below. */ | |
| 3747 retry: | |
| 3989 | 3748 /* Optimise for no indirection. */ |
| 3749 fun = original_fun; | |
| 3750 if (SYMBOLP (fun) && !EQ (fun, Qunbound) | |
| 3751 && (fun = XSYMBOL (fun)->function, SYMBOLP (fun))) | |
| 3752 { | |
| 3753 fun = indirect_function(original_fun, 1); | |
| 3754 } | |
| 428 | 3755 |
| 3756 if (SUBRP (fun)) | |
| 3757 { | |
| 3758 Lisp_Subr *subr = XSUBR (fun); | |
| 3759 int max_args = subr->max_args; | |
| 3760 | |
| 3761 if (nargs < subr->min_args) | |
| 3762 goto wrong_number_of_arguments; | |
| 3763 | |
| 3764 if (max_args == UNEVALLED) /* Optimize for the common case */ | |
| 3765 { | |
| 3766 backtrace.evalargs = 0; | |
| 1292 | 3767 PROFILE_ENTER_FUNCTION (); |
| 428 | 3768 val = (((Lisp_Object (*) (Lisp_Object)) subr_function (subr)) |
| 3769 (original_args)); | |
| 1292 | 3770 PROFILE_EXIT_FUNCTION (); |
| 428 | 3771 } |
| 3772 else if (nargs <= max_args) | |
| 3773 { | |
| 3774 struct gcpro gcpro1; | |
| 3775 Lisp_Object args[SUBR_MAX_ARGS]; | |
| 3776 REGISTER Lisp_Object *p = args; | |
| 3777 | |
| 3778 GCPRO1 (args[0]); | |
| 3779 gcpro1.nvars = 0; | |
| 3780 | |
| 3781 { | |
| 3782 LIST_LOOP_2 (arg, original_args) | |
| 3783 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3784 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3785 gcpro1.nvars++; |
| 3786 } | |
| 3787 } | |
| 3788 | |
| 3789 /* &optional args default to nil. */ | |
| 3790 while (p - args < max_args) | |
| 3791 *p++ = Qnil; | |
| 3792 | |
| 3793 backtrace.args = args; | |
| 3794 backtrace.nargs = nargs; | |
| 3795 | |
| 1292 | 3796 PROFILE_ENTER_FUNCTION (); |
| 428 | 3797 FUNCALL_SUBR (val, subr, args, max_args); |
| 1292 | 3798 PROFILE_EXIT_FUNCTION (); |
| 428 | 3799 |
| 3800 UNGCPRO; | |
| 3801 } | |
| 3802 else if (max_args == MANY) | |
| 3803 { | |
| 3804 /* Pass a vector of evaluated arguments */ | |
| 3805 struct gcpro gcpro1; | |
| 3806 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3807 REGISTER Lisp_Object *p = args; | |
| 3808 | |
| 3809 GCPRO1 (args[0]); | |
| 3810 gcpro1.nvars = 0; | |
| 3811 | |
| 3812 { | |
| 3813 LIST_LOOP_2 (arg, original_args) | |
| 3814 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3815 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3816 gcpro1.nvars++; |
| 3817 } | |
| 3818 } | |
| 3819 | |
| 3820 backtrace.args = args; | |
| 3821 backtrace.nargs = nargs; | |
| 3822 | |
| 1292 | 3823 PROFILE_ENTER_FUNCTION (); |
| 428 | 3824 val = (((Lisp_Object (*) (int, Lisp_Object *)) subr_function (subr)) |
| 3825 (nargs, args)); | |
| 1292 | 3826 PROFILE_EXIT_FUNCTION (); |
| 428 | 3827 |
| 3828 UNGCPRO; | |
| 3829 } | |
| 3830 else | |
| 3831 { | |
| 3832 wrong_number_of_arguments: | |
| 440 | 3833 val = signal_wrong_number_of_arguments_error (original_fun, nargs); |
| 428 | 3834 } |
| 3835 } | |
| 3836 else if (COMPILED_FUNCTIONP (fun)) | |
| 3837 { | |
| 3838 struct gcpro gcpro1; | |
| 3839 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3840 REGISTER Lisp_Object *p = args; | |
| 3841 | |
| 3842 GCPRO1 (args[0]); | |
| 3843 gcpro1.nvars = 0; | |
| 3844 | |
| 3845 { | |
| 3846 LIST_LOOP_2 (arg, original_args) | |
| 3847 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3848 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3849 gcpro1.nvars++; |
| 3850 } | |
| 3851 } | |
| 3852 | |
| 3853 backtrace.args = args; | |
| 3854 backtrace.nargs = nargs; | |
| 3855 backtrace.evalargs = 0; | |
| 3856 | |
| 1292 | 3857 PROFILE_ENTER_FUNCTION (); |
| 428 | 3858 val = funcall_compiled_function (fun, nargs, args); |
| 1292 | 3859 PROFILE_EXIT_FUNCTION (); |
| 428 | 3860 |
| 3861 /* Do the debug-on-exit now, while args is still GCPROed. */ | |
| 3862 if (backtrace.debug_on_exit) | |
| 3863 val = do_debug_on_exit (val); | |
| 3864 /* Don't do it again when we return to eval. */ | |
| 3865 backtrace.debug_on_exit = 0; | |
| 3866 | |
| 3867 UNGCPRO; | |
| 3868 } | |
| 3869 else if (CONSP (fun)) | |
| 3870 { | |
| 3871 Lisp_Object funcar = XCAR (fun); | |
| 3872 | |
| 3873 if (EQ (funcar, Qautoload)) | |
| 3874 { | |
| 970 | 3875 /* do_autoload GCPROs both arguments */ |
| 428 | 3876 do_autoload (fun, original_fun); |
| 3877 goto retry; | |
| 3878 } | |
| 3879 else if (EQ (funcar, Qmacro)) | |
| 3880 { | |
| 1292 | 3881 PROFILE_ENTER_FUNCTION (); |
| 428 | 3882 val = Feval (apply1 (XCDR (fun), original_args)); |
| 1292 | 3883 PROFILE_EXIT_FUNCTION (); |
| 428 | 3884 } |
| 3885 else if (EQ (funcar, Qlambda)) | |
| 3886 { | |
| 3887 struct gcpro gcpro1; | |
| 3888 Lisp_Object *args = alloca_array (Lisp_Object, nargs); | |
| 3889 REGISTER Lisp_Object *p = args; | |
| 3890 | |
| 3891 GCPRO1 (args[0]); | |
| 3892 gcpro1.nvars = 0; | |
| 3893 | |
| 3894 { | |
| 3895 LIST_LOOP_2 (arg, original_args) | |
| 3896 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
3897 *p++ = IGNORE_MULTIPLE_VALUES (Feval (arg)); |
| 428 | 3898 gcpro1.nvars++; |
| 3899 } | |
| 3900 } | |
| 3901 | |
| 3902 UNGCPRO; | |
| 3903 | |
| 3904 backtrace.args = args; /* this also GCPROs `args' */ | |
| 3905 backtrace.nargs = nargs; | |
| 3906 backtrace.evalargs = 0; | |
| 3907 | |
| 1292 | 3908 PROFILE_ENTER_FUNCTION (); |
| 428 | 3909 val = funcall_lambda (fun, nargs, args); |
| 1292 | 3910 PROFILE_EXIT_FUNCTION (); |
| 428 | 3911 |
| 3912 /* Do the debug-on-exit now, while args is still GCPROed. */ | |
| 3913 if (backtrace.debug_on_exit) | |
| 3914 val = do_debug_on_exit (val); | |
| 3915 /* Don't do it again when we return to eval. */ | |
| 3916 backtrace.debug_on_exit = 0; | |
| 3917 } | |
| 3918 else | |
| 3919 { | |
| 3920 goto invalid_function; | |
| 3921 } | |
| 3922 } | |
| 4104 | 3923 else if (UNBOUNDP (fun)) |
| 3924 { | |
| 3925 val = signal_void_function_error (original_fun); | |
| 3926 } | |
| 3927 else /* ! (SUBRP (fun) || COMPILED_FUNCTIONP (fun) || CONSP (fun) | |
| 3928 UNBOUNDP (fun)) */ | |
| 428 | 3929 { |
| 3930 invalid_function: | |
| 436 | 3931 val = signal_invalid_function_error (fun); |
| 428 | 3932 } |
| 3933 | |
| 3934 lisp_eval_depth--; | |
| 3935 if (backtrace.debug_on_exit) | |
| 3936 val = do_debug_on_exit (val); | |
| 3937 POP_BACKTRACE (backtrace); | |
| 3938 return val; | |
| 3939 } | |
| 3940 | |
| 3941 | |
| 1111 | 3942 |
| 3943 static void | |
| 3944 run_post_gc_hook (void) | |
| 3945 { | |
| 3946 Lisp_Object args[2]; | |
| 3947 | |
| 3948 args[0] = Qpost_gc_hook; | |
| 3949 args[1] = Fcons (Fcons (Qfinalize_list, zap_finalize_list ()), Qnil); | |
| 3950 | |
| 3951 run_hook_with_args_trapping_problems | |
| 1333 | 3952 (Qgarbage_collecting, 2, args, RUN_HOOKS_TO_COMPLETION, |
| 1111 | 3953 INHIBIT_QUIT | NO_INHIBIT_ERRORS); |
| 3954 } | |
| 3955 | |
| 428 | 3956 DEFUN ("funcall", Ffuncall, 1, MANY, 0, /* |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
3957 Call FUNCTION as a function, passing the remaining arguments to it. |
| 428 | 3958 Thus, (funcall 'cons 'x 'y) returns (x . y). |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
3959 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
3960 arguments: (FUNCTION &rest ARGS) |
| 428 | 3961 */ |
| 3962 (int nargs, Lisp_Object *args)) | |
| 3963 { | |
| 3964 /* This function can GC */ | |
| 3965 Lisp_Object fun; | |
| 3966 Lisp_Object val; | |
| 4162 | 3967 PROFILE_DECLARE(); |
| 428 | 3968 int fun_nargs = nargs - 1; |
| 3969 Lisp_Object *fun_args = args + 1; | |
| 3970 | |
| 1318 | 3971 /* QUIT will check for proper redisplay wrapping */ |
| 3972 | |
| 428 | 3973 QUIT; |
| 851 | 3974 |
| 3975 if (funcall_allocation_flag) | |
| 3976 { | |
| 3977 if (need_to_garbage_collect) | |
| 3978 /* Callers should gcpro lexpr args */ | |
| 3092 | 3979 #ifdef NEW_GC |
| 3980 gc_incremental (); | |
| 3981 #else /* not NEW_GC */ | |
| 851 | 3982 garbage_collect_1 (); |
| 3092 | 3983 #endif /* not NEW_GC */ |
| 851 | 3984 if (need_to_check_c_alloca) |
| 3985 { | |
| 3986 if (++funcall_alloca_count >= MAX_FUNCALLS_BETWEEN_ALLOCA_CLEANUP) | |
| 3987 { | |
| 3988 xemacs_c_alloca (0); | |
| 3989 funcall_alloca_count = 0; | |
| 3990 } | |
| 3991 } | |
| 887 | 3992 if (need_to_signal_post_gc) |
| 3993 { | |
| 3994 need_to_signal_post_gc = 0; | |
| 1111 | 3995 recompute_funcall_allocation_flag (); |
| 3263 | 3996 #ifdef NEW_GC |
| 3997 run_finalizers (); | |
| 3998 #endif /* NEW_GC */ | |
| 1111 | 3999 run_post_gc_hook (); |
| 887 | 4000 } |
| 851 | 4001 } |
| 428 | 4002 |
| 4003 if (++lisp_eval_depth > max_lisp_eval_depth) | |
| 4004 { | |
| 4005 if (max_lisp_eval_depth < 100) | |
| 4006 max_lisp_eval_depth = 100; | |
| 4007 if (lisp_eval_depth > max_lisp_eval_depth) | |
| 563 | 4008 stack_overflow ("Lisp nesting exceeds `max-lisp-eval-depth'", |
| 4009 Qunbound); | |
| 428 | 4010 } |
| 4011 | |
| 1292 | 4012 backtrace.pdlcount = specpdl_depth (); |
| 428 | 4013 backtrace.function = &args[0]; |
| 4014 backtrace.args = fun_args; | |
| 4015 backtrace.nargs = fun_nargs; | |
| 4016 backtrace.evalargs = 0; | |
| 4017 backtrace.debug_on_exit = 0; | |
| 1292 | 4018 backtrace.function_being_called = 0; |
| 428 | 4019 PUSH_BACKTRACE (backtrace); |
| 4020 | |
| 4021 if (debug_on_next_call) | |
| 4022 do_debug_on_call (Qlambda); | |
| 4023 | |
| 4024 retry: | |
| 4025 | |
| 4026 fun = args[0]; | |
| 4027 | |
| 4028 /* We could call indirect_function directly, but profiling shows | |
| 4029 this is worth optimizing by partially unrolling the loop. */ | |
| 4030 if (SYMBOLP (fun)) | |
| 4031 { | |
| 4032 fun = XSYMBOL (fun)->function; | |
| 4033 if (SYMBOLP (fun)) | |
| 4034 { | |
| 4035 fun = XSYMBOL (fun)->function; | |
| 4036 if (SYMBOLP (fun)) | |
| 4037 fun = indirect_function (fun, 1); | |
| 4038 } | |
| 4039 } | |
| 4040 | |
| 4041 if (SUBRP (fun)) | |
| 4042 { | |
| 4043 Lisp_Subr *subr = XSUBR (fun); | |
| 4044 int max_args = subr->max_args; | |
| 4045 Lisp_Object spacious_args[SUBR_MAX_ARGS]; | |
| 4046 | |
| 4047 if (fun_nargs == max_args) /* Optimize for the common case */ | |
| 4048 { | |
| 4049 funcall_subr: | |
| 1292 | 4050 PROFILE_ENTER_FUNCTION (); |
| 428 | 4051 FUNCALL_SUBR (val, subr, fun_args, max_args); |
| 1292 | 4052 PROFILE_EXIT_FUNCTION (); |
| 428 | 4053 } |
| 436 | 4054 else if (fun_nargs < subr->min_args) |
| 4055 { | |
| 4056 goto wrong_number_of_arguments; | |
| 4057 } | |
| 428 | 4058 else if (fun_nargs < max_args) |
| 4059 { | |
| 4060 Lisp_Object *p = spacious_args; | |
| 4061 | |
| 4062 /* Default optionals to nil */ | |
| 4063 while (fun_nargs--) | |
| 4064 *p++ = *fun_args++; | |
| 4065 while (p - spacious_args < max_args) | |
| 4066 *p++ = Qnil; | |
| 4067 | |
| 4068 fun_args = spacious_args; | |
| 4069 goto funcall_subr; | |
| 4070 } | |
| 4071 else if (max_args == MANY) | |
| 4072 { | |
| 1292 | 4073 PROFILE_ENTER_FUNCTION (); |
| 436 | 4074 val = SUBR_FUNCTION (subr, MANY) (fun_nargs, fun_args); |
| 1292 | 4075 PROFILE_EXIT_FUNCTION (); |
| 428 | 4076 } |
| 4077 else if (max_args == UNEVALLED) /* Can't funcall a special form */ | |
| 4078 { | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4079 /* Ugh, ugh, ugh. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4080 if (EQ (fun, XSYMBOL_FUNCTION (Qthrow))) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4081 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4082 args[0] = Qobsolete_throw; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4083 goto retry; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4084 } |
| 428 | 4085 goto invalid_function; |
| 4086 } | |
| 4087 else | |
| 4088 { | |
| 4089 wrong_number_of_arguments: | |
| 436 | 4090 val = signal_wrong_number_of_arguments_error (fun, fun_nargs); |
| 428 | 4091 } |
| 4092 } | |
| 4093 else if (COMPILED_FUNCTIONP (fun)) | |
| 4094 { | |
| 1292 | 4095 PROFILE_ENTER_FUNCTION (); |
| 428 | 4096 val = funcall_compiled_function (fun, fun_nargs, fun_args); |
| 1292 | 4097 PROFILE_EXIT_FUNCTION (); |
| 428 | 4098 } |
| 4099 else if (CONSP (fun)) | |
| 4100 { | |
| 4101 Lisp_Object funcar = XCAR (fun); | |
| 4102 | |
| 4103 if (EQ (funcar, Qlambda)) | |
| 4104 { | |
| 1292 | 4105 PROFILE_ENTER_FUNCTION (); |
| 428 | 4106 val = funcall_lambda (fun, fun_nargs, fun_args); |
| 1292 | 4107 PROFILE_EXIT_FUNCTION (); |
| 428 | 4108 } |
| 4109 else if (EQ (funcar, Qautoload)) | |
| 4110 { | |
| 970 | 4111 /* do_autoload GCPROs both arguments */ |
| 428 | 4112 do_autoload (fun, args[0]); |
| 4113 goto retry; | |
| 4114 } | |
| 4115 else /* Can't funcall a macro */ | |
| 4116 { | |
| 4117 goto invalid_function; | |
| 4118 } | |
| 4119 } | |
| 4120 else if (UNBOUNDP (fun)) | |
| 4121 { | |
| 436 | 4122 val = signal_void_function_error (args[0]); |
| 428 | 4123 } |
| 4124 else | |
| 4125 { | |
| 4126 invalid_function: | |
| 436 | 4127 val = signal_invalid_function_error (fun); |
| 428 | 4128 } |
| 4129 | |
| 4130 lisp_eval_depth--; | |
| 4131 if (backtrace.debug_on_exit) | |
| 4132 val = do_debug_on_exit (val); | |
| 4133 POP_BACKTRACE (backtrace); | |
| 4134 return val; | |
| 4135 } | |
| 4136 | |
| 4137 DEFUN ("functionp", Ffunctionp, 1, 1, 0, /* | |
| 4138 Return t if OBJECT can be called as a function, else nil. | |
| 4139 A function is an object that can be applied to arguments, | |
| 4140 using for example `funcall' or `apply'. | |
| 4141 */ | |
| 4142 (object)) | |
| 4143 { | |
| 4144 if (SYMBOLP (object)) | |
| 4145 object = indirect_function (object, 0); | |
| 4146 | |
| 919 | 4147 if (COMPILED_FUNCTIONP (object) || SUBRP (object)) |
| 4148 return Qt; | |
| 4149 if (CONSP (object)) | |
| 4150 { | |
| 4151 Lisp_Object car = XCAR (object); | |
| 4152 if (EQ (car, Qlambda)) | |
| 4153 return Qt; | |
| 4154 if (EQ (car, Qautoload) | |
| 4155 && NILP (Fcar_safe (Fcdr_safe (Fcdr_safe (Fcdr_safe (XCDR (object))))))) | |
| 4156 return Qt; | |
| 4157 } | |
| 4158 return Qnil; | |
| 428 | 4159 } |
| 4160 | |
| 4161 static Lisp_Object | |
| 4162 function_argcount (Lisp_Object function, int function_min_args_p) | |
| 4163 { | |
| 4164 Lisp_Object orig_function = function; | |
| 4165 Lisp_Object arglist; | |
| 4166 | |
| 4167 retry: | |
| 4168 | |
| 4169 if (SYMBOLP (function)) | |
| 4170 function = indirect_function (function, 1); | |
| 4171 | |
| 4172 if (SUBRP (function)) | |
| 4173 { | |
| 442 | 4174 /* Using return with the ?: operator tickles a DEC CC compiler bug. */ |
| 4175 if (function_min_args_p) | |
| 4176 return Fsubr_min_args (function); | |
| 4177 else | |
| 4178 return Fsubr_max_args (function); | |
| 428 | 4179 } |
| 4180 else if (COMPILED_FUNCTIONP (function)) | |
| 4181 { | |
| 814 | 4182 Lisp_Compiled_Function *f = XCOMPILED_FUNCTION (function); |
| 4183 | |
| 1737 | 4184 if (!OPAQUEP (f->instructions)) |
| 4185 /* Lazily munge the instructions into a more efficient form */ | |
| 4186 /* Needed to set max_args */ | |
| 4187 optimize_compiled_function (function); | |
| 4188 | |
| 814 | 4189 if (function_min_args_p) |
| 4190 return make_int (f->min_args); | |
| 4191 else if (f->max_args == MANY) | |
| 4192 return Qnil; | |
| 4193 else | |
| 4194 return make_int (f->max_args); | |
| 428 | 4195 } |
| 4196 else if (CONSP (function)) | |
| 4197 { | |
| 4198 Lisp_Object funcar = XCAR (function); | |
| 4199 | |
| 4200 if (EQ (funcar, Qmacro)) | |
| 4201 { | |
| 4202 function = XCDR (function); | |
| 4203 goto retry; | |
| 4204 } | |
| 4205 else if (EQ (funcar, Qautoload)) | |
| 4206 { | |
| 970 | 4207 /* do_autoload GCPROs both arguments */ |
| 428 | 4208 do_autoload (function, orig_function); |
| 442 | 4209 function = orig_function; |
| 428 | 4210 goto retry; |
| 4211 } | |
| 4212 else if (EQ (funcar, Qlambda)) | |
| 4213 { | |
| 4214 arglist = Fcar (XCDR (function)); | |
| 4215 } | |
| 4216 else | |
| 4217 { | |
| 4218 goto invalid_function; | |
| 4219 } | |
| 4220 } | |
| 4221 else | |
| 4222 { | |
| 4223 invalid_function: | |
| 442 | 4224 return signal_invalid_function_error (orig_function); |
| 428 | 4225 } |
| 4226 | |
| 4227 { | |
| 4228 int argcount = 0; | |
| 4229 | |
| 4230 EXTERNAL_LIST_LOOP_2 (arg, arglist) | |
| 4231 { | |
| 4232 if (EQ (arg, Qand_optional)) | |
| 4233 { | |
| 4234 if (function_min_args_p) | |
| 4235 break; | |
| 4236 } | |
| 4237 else if (EQ (arg, Qand_rest)) | |
| 4238 { | |
| 4239 if (function_min_args_p) | |
| 4240 break; | |
| 4241 else | |
| 4242 return Qnil; | |
| 4243 } | |
| 4244 else | |
| 4245 { | |
| 4246 argcount++; | |
| 4247 } | |
| 4248 } | |
| 4249 | |
| 4250 return make_int (argcount); | |
| 4251 } | |
| 4252 } | |
| 4253 | |
| 4254 DEFUN ("function-min-args", Ffunction_min_args, 1, 1, 0, /* | |
| 617 | 4255 Return the minimum number of arguments a function may be called with. |
| 428 | 4256 The function may be any form that can be passed to `funcall', |
| 4257 any special form, or any macro. | |
| 853 | 4258 |
| 4259 To check if a function can be called with a specified number of | |
| 4260 arguments, use `function-allows-args'. | |
| 428 | 4261 */ |
| 4262 (function)) | |
| 4263 { | |
| 4264 return function_argcount (function, 1); | |
| 4265 } | |
| 4266 | |
| 4267 DEFUN ("function-max-args", Ffunction_max_args, 1, 1, 0, /* | |
| 617 | 4268 Return the maximum number of arguments a function may be called with. |
| 428 | 4269 The function may be any form that can be passed to `funcall', |
| 4270 any special form, or any macro. | |
| 4271 If the function takes an arbitrary number of arguments or is | |
| 4272 a built-in special form, nil is returned. | |
| 853 | 4273 |
| 4274 To check if a function can be called with a specified number of | |
| 4275 arguments, use `function-allows-args'. | |
| 428 | 4276 */ |
| 4277 (function)) | |
| 4278 { | |
| 4279 return function_argcount (function, 0); | |
| 4280 } | |
| 4281 | |
| 4282 | |
| 4283 DEFUN ("apply", Fapply, 2, MANY, 0, /* | |
| 4284 Call FUNCTION with the remaining args, using the last arg as a list of args. | |
| 4285 Thus, (apply '+ 1 2 '(3 4)) returns 10. | |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
4286 |
|
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
4287 arguments: (FUNCTION &rest ARGS) |
| 428 | 4288 */ |
| 4289 (int nargs, Lisp_Object *args)) | |
| 4290 { | |
| 4291 /* This function can GC */ | |
| 4292 Lisp_Object fun = args[0]; | |
| 4293 Lisp_Object spread_arg = args [nargs - 1]; | |
| 4294 int numargs; | |
| 4295 int funcall_nargs; | |
| 4296 | |
| 4297 GET_EXTERNAL_LIST_LENGTH (spread_arg, numargs); | |
| 4298 | |
| 4299 if (numargs == 0) | |
| 4300 /* (apply foo 0 1 '()) */ | |
| 4301 return Ffuncall (nargs - 1, args); | |
| 4302 else if (numargs == 1) | |
| 4303 { | |
| 4304 /* (apply foo 0 1 '(2)) */ | |
| 4305 args [nargs - 1] = XCAR (spread_arg); | |
| 4306 return Ffuncall (nargs, args); | |
| 4307 } | |
| 4308 | |
| 4309 /* -1 for function, -1 for spread arg */ | |
| 4310 numargs = nargs - 2 + numargs; | |
| 4311 /* +1 for function */ | |
| 4312 funcall_nargs = 1 + numargs; | |
| 4313 | |
| 4314 if (SYMBOLP (fun)) | |
| 4315 fun = indirect_function (fun, 0); | |
| 4316 | |
| 4317 if (SUBRP (fun)) | |
| 4318 { | |
| 4319 Lisp_Subr *subr = XSUBR (fun); | |
| 4320 int max_args = subr->max_args; | |
| 4321 | |
| 4322 if (numargs < subr->min_args | |
| 4323 || (max_args >= 0 && max_args < numargs)) | |
| 4324 { | |
| 4325 /* Let funcall get the error */ | |
| 4326 } | |
| 4327 else if (max_args > numargs) | |
| 4328 { | |
| 4329 /* Avoid having funcall cons up yet another new vector of arguments | |
| 4330 by explicitly supplying nil's for optional values */ | |
| 4331 funcall_nargs += (max_args - numargs); | |
| 4332 } | |
| 4333 } | |
| 4334 else if (UNBOUNDP (fun)) | |
| 4335 { | |
| 4336 /* Let funcall get the error */ | |
| 4337 fun = args[0]; | |
| 4338 } | |
| 4339 | |
| 4340 { | |
| 4341 REGISTER int i; | |
| 4342 Lisp_Object *funcall_args = alloca_array (Lisp_Object, funcall_nargs); | |
| 4343 struct gcpro gcpro1; | |
| 4344 | |
| 4345 GCPRO1 (*funcall_args); | |
| 4346 gcpro1.nvars = funcall_nargs; | |
| 4347 | |
| 4348 /* Copy in the unspread args */ | |
| 4349 memcpy (funcall_args, args, (nargs - 1) * sizeof (Lisp_Object)); | |
| 4350 /* Spread the last arg we got. Its first element goes in | |
| 4351 the slot that it used to occupy, hence this value of I. */ | |
| 4352 for (i = nargs - 1; | |
| 4353 !NILP (spread_arg); /* i < 1 + numargs */ | |
| 4354 i++, spread_arg = XCDR (spread_arg)) | |
| 4355 { | |
| 4356 funcall_args [i] = XCAR (spread_arg); | |
| 4357 } | |
| 4358 /* Supply nil for optional args (to subrs) */ | |
| 4359 for (; i < funcall_nargs; i++) | |
| 4360 funcall_args[i] = Qnil; | |
| 4361 | |
| 4362 | |
| 4363 RETURN_UNGCPRO (Ffuncall (funcall_nargs, funcall_args)); | |
| 4364 } | |
| 4365 } | |
| 4366 | |
| 4367 /* Apply lambda list FUN to the NARGS evaluated arguments in ARGS and | |
| 4368 return the result of evaluation. */ | |
| 4369 | |
| 4370 static Lisp_Object | |
| 4371 funcall_lambda (Lisp_Object fun, int nargs, Lisp_Object args[]) | |
| 4372 { | |
| 4373 /* This function can GC */ | |
| 442 | 4374 Lisp_Object arglist, body, tail; |
| 428 | 4375 int speccount = specpdl_depth(); |
| 4376 REGISTER int i = 0; | |
| 4377 | |
| 4378 tail = XCDR (fun); | |
| 4379 | |
| 4380 if (!CONSP (tail)) | |
| 4381 goto invalid_function; | |
| 4382 | |
| 4383 arglist = XCAR (tail); | |
| 4384 body = XCDR (tail); | |
| 4385 | |
| 4386 { | |
| 4387 int optional = 0, rest = 0; | |
| 4388 | |
| 442 | 4389 EXTERNAL_LIST_LOOP_2 (symbol, arglist) |
| 428 | 4390 { |
| 4391 if (!SYMBOLP (symbol)) | |
| 4392 goto invalid_function; | |
| 4393 if (EQ (symbol, Qand_rest)) | |
| 4394 rest = 1; | |
| 4395 else if (EQ (symbol, Qand_optional)) | |
| 4396 optional = 1; | |
| 4397 else if (rest) | |
| 4398 { | |
| 4399 specbind (symbol, Flist (nargs - i, &args[i])); | |
| 4400 i = nargs; | |
| 4401 } | |
| 4402 else if (i < nargs) | |
| 4403 specbind (symbol, args[i++]); | |
| 4404 else if (!optional) | |
| 4405 goto wrong_number_of_arguments; | |
| 4406 else | |
| 4407 specbind (symbol, Qnil); | |
| 4408 } | |
| 4409 } | |
| 4410 | |
| 4411 if (i < nargs) | |
| 4412 goto wrong_number_of_arguments; | |
| 4413 | |
| 771 | 4414 return unbind_to_1 (speccount, Fprogn (body)); |
| 428 | 4415 |
| 4416 wrong_number_of_arguments: | |
| 436 | 4417 return signal_wrong_number_of_arguments_error (fun, nargs); |
| 428 | 4418 |
| 4419 invalid_function: | |
| 436 | 4420 return signal_invalid_function_error (fun); |
| 428 | 4421 } |
| 4422 | |
| 4423 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4424 /* Multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4425 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4426 A multiple value object is returned by #'values if: |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4427 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4428 -- The number of arguments to #'values is not one, and: |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4429 -- Some special form in the call stack is prepared to handle more than |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4430 one multiple value. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4431 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4432 The return value of #'values-list is analogous to that of #'values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4433 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4434 Henry Baker, in https://eprints.kfupm.edu.sa/31898/1/31898.pdf ("CONS |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4435 Should not CONS its Arguments, or, a Lazy Alloc is a Smart Alloc", ACM |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4436 Sigplan Notices 27,3 (March 1992),24-34.) says it should be possible to |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4437 allocate Common Lisp multiple-value objects on the stack, but this |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4438 assumes that variable-length records can be allocated on the stack, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4439 something not true for us. As far as I can tell, it also ignores the |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4440 contexts where multiple-values need to be thrown, or maybe it thinks such |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4441 objects should be converted to heap allocation at that point. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4442 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4443 The specific multiple values saved and returned depend on how many |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4444 multiple-values special forms in the stack are interested in; for |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4445 example, if #'multiple-value-call is somewhere in the call stack, all |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4446 values passed to #'values will be saved and returned. If an expansion of |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4447 #'multiple-value-setq with 10 SYMS is the only part of the call stack |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4448 interested in multiple values, then a maximum of ten multiple values will |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4449 be saved and returned. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4450 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4451 (#'throw passes back multiple values in its VALUE argument; this is why |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4452 we can't just take the details of the most immediate |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4453 #'multiple-value-{whatever} call to work out which values to save, we |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4454 need to look at the whole stack, or, equivalently, the dynamic variables |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4455 we set to reflect the whole stack.) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4456 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4457 The first value passed to #'values will always be saved, since that is |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4458 needed to convert a multiple value object into a single value object, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4459 something that is normally necessary independent of how many functions in |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4460 the call stack are interested in multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4461 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4462 However many values (for values of "however many" that are not one) are |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4463 saved and restored, the multiple value object knows how many arguments it |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4464 would contain were none to have been discarded, and will indicate this |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4465 on being printed from within GDB. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4466 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4467 In lisp-interaction-mode, no multiple values should be discarded (unless |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4468 they need to be for the sake of the correctness of the program); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4469 #'eval-interactive-with-multiple-value-list in lisp-mode.el wraps its |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4470 #'eval calls with #'multiple-value-list calls to avoid this. This means |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4471 that there is a small performance and memory penalty for code evaluated |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4472 in *scratch*; use M-: EXPRESSION RET if you really need to avoid |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4473 this. Lisp code execution that is not ultimately from hitting C-j in |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4474 *scratch*--that is, the vast vast majority of Lisp code execution--does |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4475 not have this penalty. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4476 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4477 Probably the most important aspect of multiple values is stated with |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4478 admirable clarity by CLTL2: |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4479 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4480 "No matter how many values a form produces, if the form is an argument |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4481 form in a function call, then exactly one value (the first one) is |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4482 used." |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4483 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4484 This means that most contexts, most of the time, will never see multiple |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4485 values. There are important exceptions; search the web for that text in |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4486 quotation marks and read the related chapter. This code handles all of |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4487 them, to my knowledge. Aidan Kehoe, Mon Mar 16 00:17:39 GMT 2009. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4488 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4489 static Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4490 make_multiple_value (Lisp_Object first_value, Elemcount count, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4491 Elemcount first_desired, Elemcount upper_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4492 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4493 Bytecount sizem; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4494 struct multiple_value *mv; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4495 Elemcount i, allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4496 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4497 assert (count != 1); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4498 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4499 if (1 != upper_limit && (0 == first_desired)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4500 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4501 /* We always allocate element zero, and that's taken into account when |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4502 working out allocated_count: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4503 first_desired = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4504 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4505 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4506 if (first_desired >= count) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4507 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4508 /* We can't pass anything back that our caller is interested in. Only |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4509 allocate for the first argument. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4510 allocated_count = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4511 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4512 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4513 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4514 allocated_count = 1 + ((upper_limit > count ? count : upper_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4515 - first_desired); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4516 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4517 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4518 sizem = FLEXIBLE_ARRAY_STRUCT_SIZEOF (multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4519 Lisp_Object, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4520 contents, allocated_count); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4521 mv = (multiple_value *) BASIC_ALLOC_LCRECORD (sizem, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4522 &lrecord_multiple_value); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4523 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4524 mv->count = count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4525 mv->first_desired = first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4526 mv->allocated_count = allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4527 mv->contents[0] = first_value; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4528 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4529 for (i = first_desired; i < upper_limit && i < count; ++i) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4530 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4531 mv->contents[1 + (i - first_desired)] = Qunbound; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4532 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4533 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4534 return wrap_multiple_value (mv); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4535 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4536 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4537 void |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4538 multiple_value_aset (Lisp_Object obj, Elemcount index, Lisp_Object value) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4539 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4540 struct multiple_value *mv = XMULTIPLE_VALUE (obj); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4541 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4542 Elemcount allocated_count = mv->allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4543 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4544 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4545 (index < first_desired || index >= (first_desired + allocated_count))) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4546 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4547 args_out_of_range (make_int (first_desired), |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4548 make_int (first_desired + allocated_count)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4549 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4550 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4551 mv->contents[index == 0 ? 0 : 1 + (index - first_desired)] = value; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4552 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4553 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4554 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4555 multiple_value_aref (Lisp_Object obj, Elemcount index) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4556 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4557 struct multiple_value *mv = XMULTIPLE_VALUE (obj); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4558 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4559 Elemcount allocated_count = mv->allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4560 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4561 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4562 (index < first_desired || index >= (first_desired + allocated_count))) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4563 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4564 args_out_of_range (make_int (first_desired), |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4565 make_int (first_desired + allocated_count)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4566 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4567 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4568 return mv->contents[index == 0 ? 0 : 1 + (index - first_desired)]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4569 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4570 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4571 static void |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4572 print_multiple_value (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4573 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4574 struct multiple_value *mv = XMULTIPLE_VALUE (obj); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4575 Elemcount first_desired = mv->first_desired; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4576 Elemcount allocated_count = mv->allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4577 Elemcount count = mv->count, index; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4578 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4579 if (print_readably) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4580 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4581 printing_unreadable_object ("multiple values"); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4582 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4583 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4584 if (0 == count) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4585 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4586 write_c_string (printcharfun, "#<zero-length multiple value>"); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4587 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4588 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4589 for (index = 0; index < count;) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4590 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4591 if (index != 0 && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4592 (index < first_desired || |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4593 index >= (first_desired + (allocated_count - 1)))) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4594 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4595 write_fmt_string (printcharfun, "#<discarded-multiple-value %d>", |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4596 index); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4597 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4598 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4599 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4600 print_internal (multiple_value_aref (obj, index), |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4601 printcharfun, escapeflag); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4602 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4603 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4604 ++index; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4605 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4606 if (count > 1 && index < count) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4607 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4608 write_c_string (printcharfun, " ;\n"); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4609 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4610 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4611 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4612 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4613 static Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4614 mark_multiple_value (Lisp_Object obj) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4615 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4616 struct multiple_value *mv = XMULTIPLE_VALUE (obj); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4617 Elemcount index, allocated_count = mv->allocated_count; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4618 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4619 for (index = 0; index < allocated_count; ++index) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4620 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4621 mark_object (mv->contents[index]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4622 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4623 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4624 return Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4625 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4626 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4627 static Bytecount |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4628 size_multiple_value (const void *lheader) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4629 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4630 return FLEXIBLE_ARRAY_STRUCT_SIZEOF (struct multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4631 Lisp_Object, contents, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4632 ((struct multiple_value *) lheader)-> |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4633 allocated_count); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4634 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4635 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4636 static const struct memory_description multiple_value_description[] = { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4637 { XD_LONG, offsetof (struct multiple_value, count) }, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4638 { XD_ELEMCOUNT, offsetof (struct multiple_value, allocated_count) }, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4639 { XD_LONG, offsetof (struct multiple_value, first_desired) }, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4640 { XD_LISP_OBJECT_ARRAY, offsetof (struct multiple_value, contents), |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4641 XD_INDIRECT (1, 0) }, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4642 { XD_END } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4643 }; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4644 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4645 DEFINE_LRECORD_SEQUENCE_IMPLEMENTATION ("multiple-value", multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4646 1, /*dumpable-flag*/ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4647 mark_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4648 print_multiple_value, 0, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4649 0, /* No equal method. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4650 0, /* No hash method. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4651 multiple_value_description, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4652 size_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4653 struct multiple_value); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4654 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4655 /* Given that FIRST and UPPER are the inclusive lower and exclusive upper |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4656 bounds for the multiple values we're interested in, modify (or don't) the |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4657 special variables used to indicate this to #'values and #'values-list. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4658 Returns the specpdl_depth() value before any modification. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4659 int |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4660 bind_multiple_value_limits (int first, int upper) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4661 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4662 int result = specpdl_depth(); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4663 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4664 if (!(upper > first)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4665 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4666 invalid_argument ("MULTIPLE-VALUE-UPPER-LIMIT must be greater than " |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4667 " FIRST-DESIRED-MULTIPLE-VALUE", Qunbound); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4668 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4669 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4670 if (upper > Vmultiple_values_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4671 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4672 args_out_of_range (make_int (upper), make_int (Vmultiple_values_limit)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4673 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4674 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4675 /* In the event that something back up the stack wants more multiple |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4676 values than we do, we need to keep its figures for |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4677 first_desired_multiple_value or multiple_value_current_limit both. It |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4678 may be that the form will throw past us. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4679 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4680 If first_desired_multiple_value is zero, this means it hasn't ever been |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4681 bound, and any value we have for first is appropriate to use. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4682 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4683 Zeroth element is always saved, no need to note that: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4684 if (0 == first) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4685 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4686 first = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4687 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4688 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4689 if (0 == first_desired_multiple_value |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4690 || first < first_desired_multiple_value) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4691 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4692 internal_bind_int (&first_desired_multiple_value, first); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4693 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4694 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4695 if (upper > multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4696 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4697 internal_bind_int (&multiple_value_current_limit, upper); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4698 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4699 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4700 return result; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4701 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4702 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4703 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4704 multiple_value_call (int nargs, Lisp_Object *args) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4705 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4706 /* The argument order here is horrible: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4707 int i, speccount = XINT (args[3]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4708 Lisp_Object result = Qnil, head = Fcons (args[0], Qnil), list_offset; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4709 struct gcpro gcpro1, gcpro2; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4710 Lisp_Object apply_args[2]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4711 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4712 GCPRO2 (head, result); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4713 list_offset = head; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4714 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4715 assert (!(MULTIPLE_VALUEP (args[0]))); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4716 CHECK_FUNCTION (args[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4717 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4718 /* Start at 4, to ignore the function, the speccount, and the arguments to |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4719 multiple-values-limit (which we don't discard because |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4720 #'multiple-value-list-internal needs them): */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4721 for (i = 4; i < nargs; ++i) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4722 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4723 result = args[i]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4724 if (MULTIPLE_VALUEP (result)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4725 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4726 Lisp_Object val; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4727 Elemcount i, count = XMULTIPLE_VALUE_COUNT (result); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4728 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4729 for (i = 0; i < count; i++) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4730 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4731 val = multiple_value_aref (result, i); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4732 assert (!UNBOUNDP (val)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4733 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4734 XSETCDR (list_offset, Fcons (val, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4735 list_offset = XCDR (list_offset); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4736 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4737 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4738 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4739 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4740 XSETCDR (list_offset, Fcons (result, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4741 list_offset = XCDR (list_offset); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4742 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4743 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4744 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4745 apply_args [0] = XCAR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4746 apply_args [1] = XCDR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4747 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4748 unbind_to (speccount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4749 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4750 RETURN_UNGCPRO (Fapply (countof(apply_args), apply_args)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4751 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4752 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4753 DEFUN ("multiple-value-call", Fmultiple_value_call, 1, UNEVALLED, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4754 Call FUNCTION with arguments FORMS, using multiple values when returned. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4755 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4756 All of the (possibly multiple) values returned by each form in FORMS are |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4757 gathered together, and given as arguments to FUNCTION; conceptually, this |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4758 function is a version of `apply' that by-passes the multiple values |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4759 infrastructure, treating multiple values as intercalated lists. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4760 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4761 arguments: (FUNCTION &rest FORMS) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4762 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4763 (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4764 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4765 int listcount, i = 0, speccount; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4766 Lisp_Object *constructed_args; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4767 struct gcpro gcpro1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4768 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4769 GET_EXTERNAL_LIST_LENGTH (args, listcount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4770 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4771 constructed_args = alloca_array (Lisp_Object, listcount + 3); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4772 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4773 /* Fcar so we error on non-cons: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4774 constructed_args[i] = IGNORE_MULTIPLE_VALUES (Feval (Fcar (args))); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4775 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4776 GCPRO1 (*constructed_args); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4777 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4778 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4779 /* The argument order is horrible here. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4780 constructed_args[i] = make_int (0); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4781 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4782 constructed_args[i] = make_int (Vmultiple_values_limit); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4783 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4784 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4785 speccount = bind_multiple_value_limits (0, Vmultiple_values_limit); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4786 constructed_args[i] = make_int (speccount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4787 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4788 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4789 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4790 LIST_LOOP_2 (elt, XCDR (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4791 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4792 constructed_args[i] = Feval (elt); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4793 gcpro1.nvars = ++i; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4794 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4795 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4796 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4797 RETURN_UNGCPRO (multiple_value_call (listcount + 3, constructed_args)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4798 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4799 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4800 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4801 multiple_value_list_internal (int nargs, Lisp_Object *args) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4802 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4803 int first = XINT (args[0]), upper = XINT (args[1]), |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4804 speccount = XINT(args[2]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4805 Lisp_Object result = Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4806 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4807 assert (nargs == 4); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4808 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4809 result = args[3]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4810 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4811 unbind_to (speccount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4812 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4813 if (MULTIPLE_VALUEP (result)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4814 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4815 Lisp_Object head = Fcons (Qnil, Qnil); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4816 Lisp_Object list_offset = head, val; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4817 Elemcount count = XMULTIPLE_VALUE_COUNT(result); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4818 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4819 for (; first < upper && first < count; ++first) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4820 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4821 val = multiple_value_aref (result, first); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4822 assert (!UNBOUNDP (val)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4823 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4824 XSETCDR (list_offset, Fcons (val, Qnil)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4825 list_offset = XCDR (list_offset); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4826 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4827 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4828 return XCDR (head); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4829 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4830 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4831 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4832 if (first == 0) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4833 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4834 return Fcons (result, Qnil); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4835 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4836 else |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4837 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4838 return Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4839 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4840 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4841 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4842 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4843 DEFUN ("multiple-value-list-internal", Fmultiple_value_list_internal, 3, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4844 UNEVALLED, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4845 Evaluate FORM. Return a list of multiple vals reflecting the other two args. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4846 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4847 Don't use this. Use `multiple-value-list', the macro specified by Common |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4848 Lisp, instead. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4849 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4850 FIRST-DESIRED-MULTIPLE-VALUE is the first element in list of multiple values |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4851 to pass back. MULTIPLE-VALUE-UPPER-LIMIT is the exclusive upper limit on |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4852 the indexes within the values that may be passed back; this function will |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4853 never return a list longer than MULTIPLE-VALUE-UPPER-LIMIT - |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4854 FIRST-DESIRED-MULTIPLE-VALUE. It may return a list shorter than that, if |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4855 `values' or `values-list' do not supply enough elements. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4856 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4857 arguments: (FIRST-DESIRED-MULTIPLE-VALUE MULTIPLE-VALUE-UPPER-LIMIT FORM) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4858 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4859 (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4860 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4861 Lisp_Object argv[4]; |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4862 int first, upper, nargs; |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4863 struct gcpro gcpro1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4864 |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4865 GET_LIST_LENGTH (args, nargs); |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4866 if (nargs != 3) |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4867 { |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4868 Fsignal (Qwrong_number_of_arguments, |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4869 list2 (Qmultiple_value_list_internal, make_int (nargs))); |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4870 } |
|
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
4871 |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4872 argv[0] = IGNORE_MULTIPLE_VALUES (Feval (XCAR (args))); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4873 CHECK_NATNUM (argv[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4874 first = XINT (argv[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4875 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4876 GCPRO1 (argv[0]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4877 gcpro1.nvars = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4878 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4879 args = XCDR (args); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4880 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4881 argv[1] = IGNORE_MULTIPLE_VALUES (Feval (XCAR (args))); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4882 CHECK_NATNUM (argv[1]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4883 upper = XINT (argv[1]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4884 gcpro1.nvars = 2; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4885 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4886 /* The unintuitive order of things here is for the sake of the bytecode; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4887 the alternative would be to encode the number of arguments in the |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4888 bytecode stream, which complicates things if we have more than 255 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4889 arguments. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4890 argv[2] = make_int (bind_multiple_value_limits (first, upper)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4891 gcpro1.nvars = 3; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4892 args = XCDR (args); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4893 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4894 /* GCPROing in this function is not strictly necessary, this Feval is the |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4895 only point that may cons up data that is not immediately discarded, and |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4896 within it is the only point (in Fmultiple_value_list_internal and |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4897 multiple_value_list) that we can garbage collect. But I'm conservative, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4898 and this function is called so rarely (only from interpreted code) that |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4899 it doesn't matter for performance. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4900 argv[3] = Feval (XCAR (args)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4901 gcpro1.nvars = 4; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4902 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4903 RETURN_UNGCPRO (multiple_value_list_internal (countof (argv), argv)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4904 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4905 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4906 DEFUN ("multiple-value-prog1", Fmultiple_value_prog1, 1, UNEVALLED, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4907 Similar to `prog1', but return any multiple values from the first form. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4908 `prog1' itself will never return multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4909 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4910 arguments: (FIRST &rest BODY) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4911 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4912 (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4913 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4914 /* This function can GC */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4915 Lisp_Object val; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4916 struct gcpro gcpro1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4917 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4918 val = Feval (XCAR (args)); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4919 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4920 GCPRO1 (val); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4921 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4922 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4923 LIST_LOOP_2 (form, XCDR (args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4924 Feval (form); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4925 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4926 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4927 RETURN_UNGCPRO (val); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4928 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4929 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4930 DEFUN ("values", Fvalues, 0, MANY, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4931 Return all ARGS as multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4932 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4933 arguments: (&rest ARGS) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4934 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4935 (int nargs, Lisp_Object *args)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4936 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4937 Lisp_Object result = Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4938 int counting = 1; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4939 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4940 /* Pathological cases, no need to cons up an object: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4941 if (1 == nargs || 1 == multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4942 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4943 return nargs ? args[0] : Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4944 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4945 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4946 /* If nargs is zero, this code is correct and desirable. With |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4947 #'multiple-value-call, we want zero-length multiple values in the |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4948 argument list to be discarded entirely, and we can't do this if we |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4949 transform them to nil. */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4950 result = make_multiple_value (nargs ? args[0] : Qnil, nargs, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4951 first_desired_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4952 multiple_value_current_limit); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4953 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4954 for (; counting < nargs; ++counting) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4955 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4956 if (counting >= first_desired_multiple_value && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4957 counting < multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4958 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4959 multiple_value_aset (result, counting, args[counting]); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4960 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4961 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4962 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4963 return result; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4964 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4965 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4966 DEFUN ("values-list", Fvalues_list, 1, 1, 0, /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4967 Return all the elements of LIST as multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4968 */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4969 (list)) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4970 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4971 Lisp_Object result = Qnil; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4972 int counting = 1, listcount; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4973 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4974 GET_EXTERNAL_LIST_LENGTH (list, listcount); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4975 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4976 /* Pathological cases, no need to cons up an object: */ |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4977 if (1 == listcount || 1 == multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4978 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4979 return Fcar_safe (list); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4980 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4981 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4982 result = make_multiple_value (Fcar_safe (list), listcount, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4983 first_desired_multiple_value, |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4984 multiple_value_current_limit); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4985 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4986 list = Fcdr_safe (list); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4987 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4988 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4989 EXTERNAL_LIST_LOOP_2 (elt, list) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4990 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4991 if (counting >= first_desired_multiple_value && |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4992 counting < multiple_value_current_limit) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4993 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4994 multiple_value_aset (result, counting, elt); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4995 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4996 ++counting; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4997 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4998 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
4999 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5000 return result; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5001 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5002 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5003 Lisp_Object |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5004 values2 (Lisp_Object first, Lisp_Object second) |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5005 { |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5006 Lisp_Object argv[2]; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5007 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5008 argv[0] = first; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5009 argv[1] = second; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5010 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5011 return Fvalues (countof (argv), argv); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5012 } |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5013 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5014 |
| 428 | 5015 /************************************************************************/ |
| 5016 /* Run hook variables in various ways. */ | |
| 5017 /************************************************************************/ | |
| 5018 | |
| 5019 DEFUN ("run-hooks", Frun_hooks, 1, MANY, 0, /* | |
| 5020 Run each hook in HOOKS. Major mode functions use this. | |
| 5021 Each argument should be a symbol, a hook variable. | |
| 5022 These symbols are processed in the order specified. | |
| 5023 If a hook symbol has a non-nil value, that value may be a function | |
| 5024 or a list of functions to be called to run the hook. | |
| 5025 If the value is a function, it is called with no arguments. | |
| 5026 If it is a list, the elements are called, in order, with no arguments. | |
| 5027 | |
| 5028 To make a hook variable buffer-local, use `make-local-hook', | |
| 5029 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5030 |
|
4693
80cd90837ac5
Add argument information to remaining MANY or UNEVALLED C subrs.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4686
diff
changeset
|
5031 arguments: (FIRST &rest REST) |
| 428 | 5032 */ |
| 5033 (int nargs, Lisp_Object *args)) | |
| 5034 { | |
| 5035 REGISTER int i; | |
| 5036 | |
| 5037 for (i = 0; i < nargs; i++) | |
| 5038 run_hook_with_args (1, args + i, RUN_HOOKS_TO_COMPLETION); | |
| 5039 | |
| 5040 return Qnil; | |
| 5041 } | |
| 5042 | |
| 5043 DEFUN ("run-hook-with-args", Frun_hook_with_args, 1, MANY, 0, /* | |
| 5044 Run HOOK with the specified arguments ARGS. | |
| 5045 HOOK should be a symbol, a hook variable. If HOOK has a non-nil | |
| 5046 value, that value may be a function or a list of functions to be | |
| 5047 called to run the hook. If the value is a function, it is called with | |
| 5048 the given arguments and its return value is returned. If it is a list | |
| 5049 of functions, those functions are called, in order, | |
| 5050 with the given arguments ARGS. | |
| 444 | 5051 It is best not to depend on the value returned by `run-hook-with-args', |
| 428 | 5052 as that may change. |
| 5053 | |
| 5054 To make a hook variable buffer-local, use `make-local-hook', | |
| 5055 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5056 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5057 arguments: (HOOK &rest ARGS) |
| 428 | 5058 */ |
| 5059 (int nargs, Lisp_Object *args)) | |
| 5060 { | |
| 5061 return run_hook_with_args (nargs, args, RUN_HOOKS_TO_COMPLETION); | |
| 5062 } | |
| 5063 | |
| 5064 DEFUN ("run-hook-with-args-until-success", Frun_hook_with_args_until_success, 1, MANY, 0, /* | |
| 5065 Run HOOK with the specified arguments ARGS. | |
| 5066 HOOK should be a symbol, a hook variable. Its value should | |
| 5067 be a list of functions. We call those functions, one by one, | |
| 5068 passing arguments ARGS to each of them, until one of them | |
| 5069 returns a non-nil value. Then we return that value. | |
| 5070 If all the functions return nil, we return nil. | |
| 5071 | |
| 5072 To make a hook variable buffer-local, use `make-local-hook', | |
| 5073 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5074 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5075 arguments: (HOOK &rest ARGS) |
| 428 | 5076 */ |
| 5077 (int nargs, Lisp_Object *args)) | |
| 5078 { | |
| 5079 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_SUCCESS); | |
| 5080 } | |
| 5081 | |
| 5082 DEFUN ("run-hook-with-args-until-failure", Frun_hook_with_args_until_failure, 1, MANY, 0, /* | |
| 5083 Run HOOK with the specified arguments ARGS. | |
| 5084 HOOK should be a symbol, a hook variable. Its value should | |
| 5085 be a list of functions. We call those functions, one by one, | |
| 5086 passing arguments ARGS to each of them, until one of them | |
| 5087 returns nil. Then we return nil. | |
| 5088 If all the functions return non-nil, we return non-nil. | |
| 5089 | |
| 5090 To make a hook variable buffer-local, use `make-local-hook', | |
| 5091 not `make-local-variable'. | |
|
4642
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5092 |
|
48b45a606961
Support #'function-arglist with built-in special forms.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4624
diff
changeset
|
5093 arguments: (HOOK &rest ARGS) |
| 428 | 5094 */ |
| 5095 (int nargs, Lisp_Object *args)) | |
| 5096 { | |
| 5097 return run_hook_with_args (nargs, args, RUN_HOOKS_UNTIL_FAILURE); | |
| 5098 } | |
| 5099 | |
| 5100 /* ARGS[0] should be a hook symbol. | |
| 5101 Call each of the functions in the hook value, passing each of them | |
| 5102 as arguments all the rest of ARGS (all NARGS - 1 elements). | |
| 5103 COND specifies a condition to test after each call | |
| 5104 to decide whether to stop. | |
| 5105 The caller (or its caller, etc) must gcpro all of ARGS, | |
| 5106 except that it isn't necessary to gcpro ARGS[0]. */ | |
| 5107 | |
| 5108 Lisp_Object | |
| 5109 run_hook_with_args_in_buffer (struct buffer *buf, int nargs, Lisp_Object *args, | |
| 5110 enum run_hooks_condition cond) | |
| 5111 { | |
| 5112 Lisp_Object sym, val, ret; | |
| 5113 | |
| 5114 if (!initialized || preparing_for_armageddon) | |
| 5115 /* We need to bail out of here pronto. */ | |
| 5116 return Qnil; | |
| 5117 | |
| 3092 | 5118 #ifndef NEW_GC |
| 428 | 5119 /* Whenever gc_in_progress is true, preparing_for_armageddon |
| 5120 will also be true unless something is really hosed. */ | |
| 5121 assert (!gc_in_progress); | |
| 3092 | 5122 #endif /* not NEW_GC */ |
| 428 | 5123 |
| 5124 sym = args[0]; | |
| 771 | 5125 val = symbol_value_in_buffer (sym, wrap_buffer (buf)); |
| 428 | 5126 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil); |
| 5127 | |
| 5128 if (UNBOUNDP (val) || NILP (val)) | |
| 5129 return ret; | |
| 5130 else if (!CONSP (val) || EQ (XCAR (val), Qlambda)) | |
| 5131 { | |
| 5132 args[0] = val; | |
| 5133 return Ffuncall (nargs, args); | |
| 5134 } | |
| 5135 else | |
| 5136 { | |
| 5137 struct gcpro gcpro1, gcpro2, gcpro3; | |
| 5138 Lisp_Object globals = Qnil; | |
| 5139 GCPRO3 (sym, val, globals); | |
| 5140 | |
| 5141 for (; | |
| 5142 CONSP (val) && ((cond == RUN_HOOKS_TO_COMPLETION) | |
| 5143 || (cond == RUN_HOOKS_UNTIL_SUCCESS ? NILP (ret) | |
| 5144 : !NILP (ret))); | |
| 5145 val = XCDR (val)) | |
| 5146 { | |
| 5147 if (EQ (XCAR (val), Qt)) | |
| 5148 { | |
| 5149 /* t indicates this hook has a local binding; | |
| 5150 it means to run the global binding too. */ | |
| 5151 globals = Fdefault_value (sym); | |
| 5152 | |
| 5153 if ((! CONSP (globals) || EQ (XCAR (globals), Qlambda)) && | |
| 5154 ! NILP (globals)) | |
| 5155 { | |
| 5156 args[0] = globals; | |
| 5157 ret = Ffuncall (nargs, args); | |
| 5158 } | |
| 5159 else | |
| 5160 { | |
| 5161 for (; | |
| 5162 CONSP (globals) && ((cond == RUN_HOOKS_TO_COMPLETION) | |
| 5163 || (cond == RUN_HOOKS_UNTIL_SUCCESS | |
| 5164 ? NILP (ret) | |
| 5165 : !NILP (ret))); | |
| 5166 globals = XCDR (globals)) | |
| 5167 { | |
| 5168 args[0] = XCAR (globals); | |
| 5169 /* In a global value, t should not occur. If it does, we | |
| 5170 must ignore it to avoid an endless loop. */ | |
| 5171 if (!EQ (args[0], Qt)) | |
| 5172 ret = Ffuncall (nargs, args); | |
| 5173 } | |
| 5174 } | |
| 5175 } | |
| 5176 else | |
| 5177 { | |
| 5178 args[0] = XCAR (val); | |
| 5179 ret = Ffuncall (nargs, args); | |
| 5180 } | |
| 5181 } | |
| 5182 | |
| 5183 UNGCPRO; | |
| 5184 return ret; | |
| 5185 } | |
| 5186 } | |
| 5187 | |
| 5188 Lisp_Object | |
| 5189 run_hook_with_args (int nargs, Lisp_Object *args, | |
| 5190 enum run_hooks_condition cond) | |
| 5191 { | |
| 5192 return run_hook_with_args_in_buffer (current_buffer, nargs, args, cond); | |
| 5193 } | |
| 5194 | |
| 5195 #if 0 | |
| 5196 | |
| 853 | 5197 /* From FSF 19.30, not currently used; seems like a big kludge. */ |
| 428 | 5198 |
| 5199 /* Run a hook symbol ARGS[0], but use FUNLIST instead of the actual | |
| 5200 present value of that symbol. | |
| 5201 Call each element of FUNLIST, | |
| 5202 passing each of them the rest of ARGS. | |
| 5203 The caller (or its caller, etc) must gcpro all of ARGS, | |
| 5204 except that it isn't necessary to gcpro ARGS[0]. */ | |
| 5205 | |
| 5206 Lisp_Object | |
| 5207 run_hook_list_with_args (Lisp_Object funlist, int nargs, Lisp_Object *args) | |
| 5208 { | |
| 853 | 5209 omitted; |
| 428 | 5210 } |
| 5211 | |
| 5212 #endif /* 0 */ | |
| 5213 | |
| 5214 void | |
| 5215 va_run_hook_with_args (Lisp_Object hook_var, int nargs, ...) | |
| 5216 { | |
| 5217 /* This function can GC */ | |
| 5218 struct gcpro gcpro1; | |
| 5219 int i; | |
| 5220 va_list vargs; | |
| 5221 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 5222 | |
| 5223 va_start (vargs, nargs); | |
| 5224 funcall_args[0] = hook_var; | |
| 5225 for (i = 0; i < nargs; i++) | |
| 5226 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 5227 va_end (vargs); | |
| 5228 | |
| 5229 GCPRO1 (*funcall_args); | |
| 5230 gcpro1.nvars = nargs + 1; | |
| 5231 run_hook_with_args (nargs + 1, funcall_args, RUN_HOOKS_TO_COMPLETION); | |
| 5232 UNGCPRO; | |
| 5233 } | |
| 5234 | |
| 5235 void | |
| 5236 va_run_hook_with_args_in_buffer (struct buffer *buf, Lisp_Object hook_var, | |
| 5237 int nargs, ...) | |
| 5238 { | |
| 5239 /* This function can GC */ | |
| 5240 struct gcpro gcpro1; | |
| 5241 int i; | |
| 5242 va_list vargs; | |
| 5243 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 5244 | |
| 5245 va_start (vargs, nargs); | |
| 5246 funcall_args[0] = hook_var; | |
| 5247 for (i = 0; i < nargs; i++) | |
| 5248 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 5249 va_end (vargs); | |
| 5250 | |
| 5251 GCPRO1 (*funcall_args); | |
| 5252 gcpro1.nvars = nargs + 1; | |
| 5253 run_hook_with_args_in_buffer (buf, nargs + 1, funcall_args, | |
| 5254 RUN_HOOKS_TO_COMPLETION); | |
| 5255 UNGCPRO; | |
| 5256 } | |
| 5257 | |
| 5258 Lisp_Object | |
| 5259 run_hook (Lisp_Object hook) | |
| 5260 { | |
| 853 | 5261 return run_hook_with_args (1, &hook, RUN_HOOKS_TO_COMPLETION); |
| 428 | 5262 } |
| 5263 | |
| 5264 | |
| 5265 /************************************************************************/ | |
| 5266 /* Front-ends to eval, funcall, apply */ | |
| 5267 /************************************************************************/ | |
| 5268 | |
| 5269 /* Apply fn to arg */ | |
| 5270 Lisp_Object | |
| 5271 apply1 (Lisp_Object fn, Lisp_Object arg) | |
| 5272 { | |
| 5273 /* This function can GC */ | |
| 5274 struct gcpro gcpro1; | |
| 5275 Lisp_Object args[2]; | |
| 5276 | |
| 5277 if (NILP (arg)) | |
| 5278 return Ffuncall (1, &fn); | |
| 5279 GCPRO1 (args[0]); | |
| 5280 gcpro1.nvars = 2; | |
| 5281 args[0] = fn; | |
| 5282 args[1] = arg; | |
| 5283 RETURN_UNGCPRO (Fapply (2, args)); | |
| 5284 } | |
| 5285 | |
| 5286 /* Call function fn on no arguments */ | |
| 5287 Lisp_Object | |
| 5288 call0 (Lisp_Object fn) | |
| 5289 { | |
| 5290 /* This function can GC */ | |
| 5291 struct gcpro gcpro1; | |
| 5292 | |
| 5293 GCPRO1 (fn); | |
| 5294 RETURN_UNGCPRO (Ffuncall (1, &fn)); | |
| 5295 } | |
| 5296 | |
| 5297 /* Call function fn with argument arg0 */ | |
| 5298 Lisp_Object | |
| 5299 call1 (Lisp_Object fn, | |
| 5300 Lisp_Object arg0) | |
| 5301 { | |
| 5302 /* This function can GC */ | |
| 5303 struct gcpro gcpro1; | |
| 5304 Lisp_Object args[2]; | |
| 5305 args[0] = fn; | |
| 5306 args[1] = arg0; | |
| 5307 GCPRO1 (args[0]); | |
| 5308 gcpro1.nvars = 2; | |
| 5309 RETURN_UNGCPRO (Ffuncall (2, args)); | |
| 5310 } | |
| 5311 | |
| 5312 /* Call function fn with arguments arg0, arg1 */ | |
| 5313 Lisp_Object | |
| 5314 call2 (Lisp_Object fn, | |
| 5315 Lisp_Object arg0, Lisp_Object arg1) | |
| 5316 { | |
| 5317 /* This function can GC */ | |
| 5318 struct gcpro gcpro1; | |
| 5319 Lisp_Object args[3]; | |
| 5320 args[0] = fn; | |
| 5321 args[1] = arg0; | |
| 5322 args[2] = arg1; | |
| 5323 GCPRO1 (args[0]); | |
| 5324 gcpro1.nvars = 3; | |
| 5325 RETURN_UNGCPRO (Ffuncall (3, args)); | |
| 5326 } | |
| 5327 | |
| 5328 /* Call function fn with arguments arg0, arg1, arg2 */ | |
| 5329 Lisp_Object | |
| 5330 call3 (Lisp_Object fn, | |
| 5331 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2) | |
| 5332 { | |
| 5333 /* This function can GC */ | |
| 5334 struct gcpro gcpro1; | |
| 5335 Lisp_Object args[4]; | |
| 5336 args[0] = fn; | |
| 5337 args[1] = arg0; | |
| 5338 args[2] = arg1; | |
| 5339 args[3] = arg2; | |
| 5340 GCPRO1 (args[0]); | |
| 5341 gcpro1.nvars = 4; | |
| 5342 RETURN_UNGCPRO (Ffuncall (4, args)); | |
| 5343 } | |
| 5344 | |
| 5345 /* Call function fn with arguments arg0, arg1, arg2, arg3 */ | |
| 5346 Lisp_Object | |
| 5347 call4 (Lisp_Object fn, | |
| 5348 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5349 Lisp_Object arg3) | |
| 5350 { | |
| 5351 /* This function can GC */ | |
| 5352 struct gcpro gcpro1; | |
| 5353 Lisp_Object args[5]; | |
| 5354 args[0] = fn; | |
| 5355 args[1] = arg0; | |
| 5356 args[2] = arg1; | |
| 5357 args[3] = arg2; | |
| 5358 args[4] = arg3; | |
| 5359 GCPRO1 (args[0]); | |
| 5360 gcpro1.nvars = 5; | |
| 5361 RETURN_UNGCPRO (Ffuncall (5, args)); | |
| 5362 } | |
| 5363 | |
| 5364 /* Call function fn with arguments arg0, arg1, arg2, arg3, arg4 */ | |
| 5365 Lisp_Object | |
| 5366 call5 (Lisp_Object fn, | |
| 5367 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5368 Lisp_Object arg3, Lisp_Object arg4) | |
| 5369 { | |
| 5370 /* This function can GC */ | |
| 5371 struct gcpro gcpro1; | |
| 5372 Lisp_Object args[6]; | |
| 5373 args[0] = fn; | |
| 5374 args[1] = arg0; | |
| 5375 args[2] = arg1; | |
| 5376 args[3] = arg2; | |
| 5377 args[4] = arg3; | |
| 5378 args[5] = arg4; | |
| 5379 GCPRO1 (args[0]); | |
| 5380 gcpro1.nvars = 6; | |
| 5381 RETURN_UNGCPRO (Ffuncall (6, args)); | |
| 5382 } | |
| 5383 | |
| 5384 Lisp_Object | |
| 5385 call6 (Lisp_Object fn, | |
| 5386 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5387 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5) | |
| 5388 { | |
| 5389 /* This function can GC */ | |
| 5390 struct gcpro gcpro1; | |
| 5391 Lisp_Object args[7]; | |
| 5392 args[0] = fn; | |
| 5393 args[1] = arg0; | |
| 5394 args[2] = arg1; | |
| 5395 args[3] = arg2; | |
| 5396 args[4] = arg3; | |
| 5397 args[5] = arg4; | |
| 5398 args[6] = arg5; | |
| 5399 GCPRO1 (args[0]); | |
| 5400 gcpro1.nvars = 7; | |
| 5401 RETURN_UNGCPRO (Ffuncall (7, args)); | |
| 5402 } | |
| 5403 | |
| 5404 Lisp_Object | |
| 5405 call7 (Lisp_Object fn, | |
| 5406 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5407 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5, | |
| 5408 Lisp_Object arg6) | |
| 5409 { | |
| 5410 /* This function can GC */ | |
| 5411 struct gcpro gcpro1; | |
| 5412 Lisp_Object args[8]; | |
| 5413 args[0] = fn; | |
| 5414 args[1] = arg0; | |
| 5415 args[2] = arg1; | |
| 5416 args[3] = arg2; | |
| 5417 args[4] = arg3; | |
| 5418 args[5] = arg4; | |
| 5419 args[6] = arg5; | |
| 5420 args[7] = arg6; | |
| 5421 GCPRO1 (args[0]); | |
| 5422 gcpro1.nvars = 8; | |
| 5423 RETURN_UNGCPRO (Ffuncall (8, args)); | |
| 5424 } | |
| 5425 | |
| 5426 Lisp_Object | |
| 5427 call8 (Lisp_Object fn, | |
| 5428 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5429 Lisp_Object arg3, Lisp_Object arg4, Lisp_Object arg5, | |
| 5430 Lisp_Object arg6, Lisp_Object arg7) | |
| 5431 { | |
| 5432 /* This function can GC */ | |
| 5433 struct gcpro gcpro1; | |
| 5434 Lisp_Object args[9]; | |
| 5435 args[0] = fn; | |
| 5436 args[1] = arg0; | |
| 5437 args[2] = arg1; | |
| 5438 args[3] = arg2; | |
| 5439 args[4] = arg3; | |
| 5440 args[5] = arg4; | |
| 5441 args[6] = arg5; | |
| 5442 args[7] = arg6; | |
| 5443 args[8] = arg7; | |
| 5444 GCPRO1 (args[0]); | |
| 5445 gcpro1.nvars = 9; | |
| 5446 RETURN_UNGCPRO (Ffuncall (9, args)); | |
| 5447 } | |
| 5448 | |
| 5449 Lisp_Object | |
| 5450 call0_in_buffer (struct buffer *buf, Lisp_Object fn) | |
| 5451 { | |
| 5452 if (current_buffer == buf) | |
| 5453 return call0 (fn); | |
| 5454 else | |
| 5455 { | |
| 5456 Lisp_Object val; | |
| 5457 int speccount = specpdl_depth(); | |
| 5458 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5459 set_buffer_internal (buf); | |
| 5460 val = call0 (fn); | |
| 771 | 5461 unbind_to (speccount); |
| 428 | 5462 return val; |
| 5463 } | |
| 5464 } | |
| 5465 | |
| 5466 Lisp_Object | |
| 5467 call1_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5468 Lisp_Object arg0) | |
| 5469 { | |
| 5470 if (current_buffer == buf) | |
| 5471 return call1 (fn, arg0); | |
| 5472 else | |
| 5473 { | |
| 5474 Lisp_Object val; | |
| 5475 int speccount = specpdl_depth(); | |
| 5476 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5477 set_buffer_internal (buf); | |
| 5478 val = call1 (fn, arg0); | |
| 771 | 5479 unbind_to (speccount); |
| 428 | 5480 return val; |
| 5481 } | |
| 5482 } | |
| 5483 | |
| 5484 Lisp_Object | |
| 5485 call2_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5486 Lisp_Object arg0, Lisp_Object arg1) | |
| 5487 { | |
| 5488 if (current_buffer == buf) | |
| 5489 return call2 (fn, arg0, arg1); | |
| 5490 else | |
| 5491 { | |
| 5492 Lisp_Object val; | |
| 5493 int speccount = specpdl_depth(); | |
| 5494 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5495 set_buffer_internal (buf); | |
| 5496 val = call2 (fn, arg0, arg1); | |
| 771 | 5497 unbind_to (speccount); |
| 428 | 5498 return val; |
| 5499 } | |
| 5500 } | |
| 5501 | |
| 5502 Lisp_Object | |
| 5503 call3_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5504 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2) | |
| 5505 { | |
| 5506 if (current_buffer == buf) | |
| 5507 return call3 (fn, arg0, arg1, arg2); | |
| 5508 else | |
| 5509 { | |
| 5510 Lisp_Object val; | |
| 5511 int speccount = specpdl_depth(); | |
| 5512 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5513 set_buffer_internal (buf); | |
| 5514 val = call3 (fn, arg0, arg1, arg2); | |
| 771 | 5515 unbind_to (speccount); |
| 428 | 5516 return val; |
| 5517 } | |
| 5518 } | |
| 5519 | |
| 5520 Lisp_Object | |
| 5521 call4_in_buffer (struct buffer *buf, Lisp_Object fn, | |
| 5522 Lisp_Object arg0, Lisp_Object arg1, Lisp_Object arg2, | |
| 5523 Lisp_Object arg3) | |
| 5524 { | |
| 5525 if (current_buffer == buf) | |
| 5526 return call4 (fn, arg0, arg1, arg2, arg3); | |
| 5527 else | |
| 5528 { | |
| 5529 Lisp_Object val; | |
| 5530 int speccount = specpdl_depth(); | |
| 5531 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5532 set_buffer_internal (buf); | |
| 5533 val = call4 (fn, arg0, arg1, arg2, arg3); | |
| 771 | 5534 unbind_to (speccount); |
| 428 | 5535 return val; |
| 5536 } | |
| 5537 } | |
| 5538 | |
| 5539 Lisp_Object | |
| 5540 eval_in_buffer (struct buffer *buf, Lisp_Object form) | |
| 5541 { | |
| 5542 if (current_buffer == buf) | |
| 5543 return Feval (form); | |
| 5544 else | |
| 5545 { | |
| 5546 Lisp_Object val; | |
| 5547 int speccount = specpdl_depth(); | |
| 5548 record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
| 5549 set_buffer_internal (buf); | |
| 5550 val = Feval (form); | |
| 771 | 5551 unbind_to (speccount); |
| 428 | 5552 return val; |
| 5553 } | |
| 5554 } | |
| 5555 | |
| 5556 | |
| 5557 /************************************************************************/ | |
| 5558 /* Error-catching front-ends to eval, funcall, apply */ | |
| 5559 /************************************************************************/ | |
| 5560 | |
| 853 | 5561 int |
| 5562 get_inhibit_flags (void) | |
| 5563 { | |
| 5564 return inhibit_flags; | |
| 5565 } | |
| 5566 | |
| 5567 void | |
| 2286 | 5568 check_allowed_operation (int what, Lisp_Object obj, Lisp_Object UNUSED (prop)) |
| 853 | 5569 { |
| 5570 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5571 { | |
| 5572 if (what == OPERATION_MODIFY_BUFFER_TEXT && BUFFERP (obj) | |
| 5573 && NILP (memq_no_quit (obj, Vmodifiable_buffers))) | |
| 5574 invalid_change | |
| 5575 ("Modification of this buffer not currently permitted", obj); | |
| 5576 } | |
| 5577 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5578 { | |
| 5579 if (what == OPERATION_DELETE_OBJECT | |
| 5580 && (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5581 || CONSOLEP (obj)) | |
| 5582 && NILP (memq_no_quit (obj, Vdeletable_permanent_display_objects))) | |
| 5583 invalid_change | |
| 5584 ("Deletion of this object not currently permitted", obj); | |
| 5585 } | |
| 5586 } | |
| 5587 | |
| 5588 void | |
| 5589 note_object_created (Lisp_Object obj) | |
| 5590 { | |
| 5591 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5592 { | |
| 5593 if (BUFFERP (obj)) | |
| 5594 Vmodifiable_buffers = Fcons (obj, Vmodifiable_buffers); | |
| 5595 } | |
| 5596 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5597 { | |
| 5598 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5599 || CONSOLEP (obj)) | |
| 5600 Vdeletable_permanent_display_objects = | |
| 5601 Fcons (obj, Vdeletable_permanent_display_objects); | |
| 5602 } | |
| 5603 } | |
| 5604 | |
| 5605 void | |
| 5606 note_object_deleted (Lisp_Object obj) | |
| 5607 { | |
| 5608 if (inhibit_flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5609 { | |
| 5610 if (BUFFERP (obj)) | |
| 5611 Vmodifiable_buffers = delq_no_quit (obj, Vmodifiable_buffers); | |
| 5612 } | |
| 5613 if (inhibit_flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5614 { | |
| 5615 if (BUFFERP (obj) || WINDOWP (obj) || FRAMEP (obj) || DEVICEP (obj) | |
| 5616 || CONSOLEP (obj)) | |
| 5617 Vdeletable_permanent_display_objects = | |
| 5618 delq_no_quit (obj, Vdeletable_permanent_display_objects); | |
| 5619 } | |
| 5620 } | |
| 5621 | |
| 5622 struct call_trapping_problems | |
| 5623 { | |
| 5624 Lisp_Object catchtag; | |
| 5625 Lisp_Object error_conditions; | |
| 5626 Lisp_Object data; | |
| 5627 Lisp_Object backtrace; | |
| 5628 Lisp_Object warning_class; | |
| 5629 | |
| 867 | 5630 const CIbyte *warning_string; |
| 853 | 5631 Lisp_Object (*fun) (void *); |
| 5632 void *arg; | |
| 5633 }; | |
| 428 | 5634 |
| 2532 | 5635 static Lisp_Object |
| 5636 maybe_get_trapping_problems_backtrace (void) | |
| 5637 { | |
| 5638 Lisp_Object backtrace; | |
| 853 | 5639 |
| 1123 | 5640 if (!(inhibit_flags & INHIBIT_WARNING_ISSUE) |
| 2532 | 5641 && !warning_will_be_discarded (current_warning_level ())) |
| 428 | 5642 { |
| 1333 | 5643 struct gcpro gcpro1; |
| 5644 Lisp_Object lstream = Qnil; | |
| 5645 int speccount = specpdl_depth (); | |
| 5646 | |
| 853 | 5647 /* We're no longer protected against errors or quit here, so at |
| 5648 least let's temporarily inhibit quit. We definitely do not | |
| 5649 want to inhibit quit during the calling of the function | |
| 5650 itself!!!!!!!!!!! */ | |
| 5651 | |
| 5652 specbind (Qinhibit_quit, Qt); | |
| 5653 | |
| 5654 GCPRO1 (lstream); | |
| 5655 lstream = make_resizing_buffer_output_stream (); | |
| 5656 Fbacktrace (lstream, Qt); | |
| 5657 Lstream_flush (XLSTREAM (lstream)); | |
| 2532 | 5658 backtrace = resizing_buffer_to_lisp_string (XLSTREAM (lstream)); |
| 853 | 5659 Lstream_delete (XLSTREAM (lstream)); |
| 5660 UNGCPRO; | |
| 5661 | |
| 5662 unbind_to (speccount); | |
| 428 | 5663 } |
| 853 | 5664 else |
| 2532 | 5665 backtrace = Qnil; |
| 5666 | |
| 5667 return backtrace; | |
| 5668 } | |
| 5669 | |
| 5670 static DECLARE_DOESNT_RETURN_TYPE | |
| 5671 (Lisp_Object, flagged_a_squirmer (Lisp_Object, Lisp_Object, Lisp_Object)); | |
| 5672 | |
| 5673 static DOESNT_RETURN_TYPE (Lisp_Object) | |
| 5674 flagged_a_squirmer (Lisp_Object error_conditions, Lisp_Object data, | |
| 5675 Lisp_Object opaque) | |
| 5676 { | |
| 5677 struct call_trapping_problems *p = | |
| 5678 (struct call_trapping_problems *) get_opaque_ptr (opaque); | |
| 5679 | |
| 5680 if (!EQ (error_conditions, Qquit)) | |
| 5681 p->backtrace = maybe_get_trapping_problems_backtrace (); | |
| 5682 else | |
| 853 | 5683 p->backtrace = Qnil; |
| 5684 p->error_conditions = error_conditions; | |
| 5685 p->data = data; | |
| 5686 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
5687 throw_or_bomb_out (p->catchtag, Qnil, 0, Qnil, Qnil); |
| 2268 | 5688 RETURN_NOT_REACHED (Qnil); |
| 853 | 5689 } |
| 5690 | |
| 5691 static Lisp_Object | |
| 5692 call_trapping_problems_2 (Lisp_Object opaque) | |
| 5693 { | |
| 5694 struct call_trapping_problems *p = | |
| 5695 (struct call_trapping_problems *) get_opaque_ptr (opaque); | |
| 5696 | |
| 5697 return (p->fun) (p->arg); | |
| 428 | 5698 } |
| 5699 | |
| 5700 static Lisp_Object | |
| 853 | 5701 call_trapping_problems_1 (Lisp_Object opaque) |
| 5702 { | |
| 5703 return call_with_condition_handler (flagged_a_squirmer, opaque, | |
| 5704 call_trapping_problems_2, opaque); | |
| 5705 } | |
| 5706 | |
| 1333 | 5707 static void |
| 5708 issue_call_trapping_problems_warning (Lisp_Object warning_class, | |
| 5709 const CIbyte *warning_string, | |
| 5710 struct call_trapping_problems_result *p) | |
| 5711 { | |
| 5712 if (!warning_will_be_discarded (current_warning_level ())) | |
| 5713 { | |
| 5714 int depth = specpdl_depth (); | |
| 5715 | |
| 5716 /* We're no longer protected against errors or quit here, so at | |
| 5717 least let's temporarily inhibit quit. */ | |
| 5718 specbind (Qinhibit_quit, Qt); | |
| 5719 | |
| 5720 if (p->caught_throw) | |
| 5721 { | |
| 5722 Lisp_Object errstr = | |
| 5723 emacs_sprintf_string_lisp | |
| 2532 | 5724 ("%s: Attempt to throw outside of function:" |
| 5725 "To catch `%s' with value `%s'\n\nBacktrace follows:\n\n%s", | |
| 2725 | 5726 Qnil, 4, |
| 1333 | 5727 build_msg_string (warning_string ? warning_string : "error"), |
| 2532 | 5728 p->thrown_tag, p->thrown_value, p->backtrace); |
| 1333 | 5729 warn_when_safe_lispobj (Qerror, current_warning_level (), errstr); |
| 5730 } | |
| 2421 | 5731 else if (p->caught_error && !EQ (p->error_conditions, Qquit)) |
| 1333 | 5732 { |
| 5733 Lisp_Object errstr; | |
| 5734 /* #### This should call | |
| 5735 (with-output-to-string (display-error (cons error_conditions | |
| 5736 data)) | |
| 5737 but that stuff is all in Lisp currently. */ | |
| 5738 errstr = | |
| 5739 emacs_sprintf_string_lisp | |
| 5740 ("%s: (%s %s)\n\nBacktrace follows:\n\n%s", | |
| 5741 Qnil, 4, | |
| 5742 build_msg_string (warning_string ? warning_string : "error"), | |
| 5743 p->error_conditions, p->data, p->backtrace); | |
| 5744 | |
| 5745 warn_when_safe_lispobj (warning_class, current_warning_level (), | |
| 5746 errstr); | |
| 5747 } | |
| 5748 | |
| 5749 unbind_to (depth); | |
| 5750 } | |
| 5751 } | |
| 5752 | |
| 1318 | 5753 /* Turn on the trapping flags in FLAGS -- see call_trapping_problems(). |
| 5754 This cannot handle INTERNAL_INHIBIT_THROWS() or INTERNAL_INHIBIT_ERRORS | |
| 5755 (because they ultimately boil down to a setjmp()!) -- you must directly | |
| 5756 use call_trapping_problems() for that. Turn the flags off with | |
| 5757 unbind_to(). Returns the "canonicalized" flags (particularly in the | |
| 5758 case of INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY, which is shorthand for | |
| 5759 various other flags). */ | |
| 5760 | |
| 5761 int | |
| 5762 set_trapping_problems_flags (int flags) | |
| 5763 { | |
| 5764 int new_inhibit_flags; | |
| 5765 | |
| 5766 if (flags & INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY) | |
| 5767 flags |= INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION | |
| 5768 | INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION | |
| 5769 | INHIBIT_ENTERING_DEBUGGER | |
| 5770 | INHIBIT_WARNING_ISSUE | |
| 5771 | INHIBIT_GC; | |
| 5772 | |
| 5773 new_inhibit_flags = inhibit_flags | flags; | |
| 5774 if (new_inhibit_flags != inhibit_flags) | |
| 5775 internal_bind_int (&inhibit_flags, new_inhibit_flags); | |
| 5776 | |
| 5777 if (flags & INHIBIT_QUIT) | |
| 5778 specbind (Qinhibit_quit, Qt); | |
| 5779 | |
| 5780 if (flags & UNINHIBIT_QUIT) | |
| 5781 begin_do_check_for_quit (); | |
| 5782 | |
| 5783 if (flags & INHIBIT_GC) | |
| 5784 begin_gc_forbidden (); | |
| 5785 | |
| 5786 /* #### If we have nested calls to call_trapping_problems(), and the | |
| 5787 inner one creates some buffers/etc., should the outer one be able | |
| 5788 to delete them? I think so, but it means we need to combine rather | |
| 5789 than just reset the value. */ | |
| 5790 if (flags & INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION) | |
| 5791 internal_bind_lisp_object (&Vdeletable_permanent_display_objects, Qnil); | |
| 5792 | |
| 5793 if (flags & INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION) | |
| 5794 internal_bind_lisp_object (&Vmodifiable_buffers, Qnil); | |
| 5795 | |
| 5796 return flags; | |
| 5797 } | |
| 5798 | |
| 853 | 5799 /* This is equivalent to (*fun) (arg), except that various conditions |
| 5800 can be trapped or inhibited, according to FLAGS. | |
| 5801 | |
| 5802 If FLAGS does not contain NO_INHIBIT_ERRORS, when an error occurs, | |
| 5803 the error is caught and a warning is issued, specifying the | |
| 5804 specific error that occurred and a backtrace. In that case, | |
| 5805 WARNING_STRING should be given, and will be printed at the | |
| 5806 beginning of the error to indicate where the error occurred. | |
| 5807 | |
| 5808 If FLAGS does not contain NO_INHIBIT_THROWS, all attempts to | |
| 5809 `throw' out of the function being called are trapped, and a warning | |
| 5810 issued. (Again, WARNING_STRING should be given.) | |
| 5811 | |
| 2367 | 5812 If FLAGS contains INHIBIT_WARNING_ISSUE, no warnings are issued; |
| 853 | 5813 this applies to recursive invocations of call_trapping_problems, too. |
| 5814 | |
| 1333 | 5815 If FLAGS contains POSTPONE_WARNING_ISSUE, no warnings are issued; |
| 5816 but values useful for generating a warning are still computed (in | |
| 5817 particular, the backtrace), so that the calling function can issue | |
| 5818 a warning. | |
| 5819 | |
| 853 | 5820 If FLAGS contains ISSUE_WARNINGS_AT_DEBUG_LEVEL, warnings will be |
| 5821 issued, but at level `debug', which normally is below the minimum | |
| 5822 specified by `log-warning-minimum-level', meaning such warnings will | |
| 5823 be ignored entirely. The user can change this variable, however, | |
| 5824 to see the warnings.) | |
| 5825 | |
| 5826 Note: If neither of NO_INHIBIT_THROWS or NO_INHIBIT_ERRORS is | |
| 5827 given, you are *guaranteed* that there will be no non-local exits | |
| 5828 out of this function. | |
| 5829 | |
| 5830 If FLAGS contains INHIBIT_QUIT, QUIT using C-g is inhibited. (This | |
| 5831 is *rarely* a good idea. Unless you use NO_INHIBIT_ERRORS, QUIT is | |
| 5832 automatically caught as well, and treated as an error; you can | |
| 5833 check for this using EQ (problems->error_conditions, Qquit). | |
| 5834 | |
| 5835 If FLAGS contains UNINHIBIT_QUIT, QUIT checking will be explicitly | |
| 5836 turned on. (It will abort the code being called, but will still be | |
| 5837 trapped and reported as an error, unless NO_INHIBIT_ERRORS is | |
| 5838 given.) This is useful when QUIT checking has been turned off by a | |
| 5839 higher-level caller. | |
| 5840 | |
| 5841 If FLAGS contains INHIBIT_GC, garbage collection is inhibited. | |
| 1123 | 5842 This is useful for Lisp called within redisplay, for example. |
| 853 | 5843 |
| 5844 If FLAGS contains INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION, | |
| 5845 Lisp code is not allowed to delete any window, buffers, frames, devices, | |
| 5846 or consoles that were already in existence at the time this function | |
| 5847 was called. (However, it's perfectly legal for code to create a new | |
| 5848 buffer and then delete it.) | |
| 5849 | |
| 5850 #### It might be useful to have a flag that inhibits deletion of a | |
| 5851 specific permanent display object and everything it's attached to | |
| 5852 (e.g. a window, and the buffer, frame, device, and console it's | |
| 5853 attached to. | |
| 5854 | |
| 5855 If FLAGS contains INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION, Lisp | |
| 5856 code is not allowed to modify the text of any buffers that were | |
| 5857 already in existence at the time this function was called. | |
| 5858 (However, it's perfectly legal for code to create a new buffer and | |
| 5859 then modify its text.) | |
| 5860 | |
| 5861 [These last two flags are implemented using global variables | |
| 5862 Vdeletable_permanent_display_objects and Vmodifiable_buffers, | |
| 5863 which keep track of a list of all buffers or permanent display | |
| 5864 objects created since the last time one of these flags was set. | |
| 5865 The code that deletes buffers, etc. and modifies buffers checks | |
| 5866 | |
| 5867 (1) if the corresponding flag is set (through the global variable | |
| 5868 inhibit_flags or its accessor function get_inhibit_flags()), and | |
| 5869 | |
| 5870 (2) if the object to be modified or deleted is not in the | |
| 5871 appropriate list. | |
| 5872 | |
| 5873 If so, it signals an error. | |
| 5874 | |
| 5875 Recursive calls to call_trapping_problems() are allowed. In | |
| 5876 the case of the two flags mentioned above, the current values | |
| 5877 of the global variables are stored in an unwind-protect, and | |
| 5878 they're reset to nil.] | |
| 5879 | |
| 5880 If FLAGS contains INHIBIT_ENTERING_DEBUGGER, the debugger will not | |
| 5881 be entered if an error occurs inside the Lisp code being called, | |
| 5882 even when the user has requested an error. In such case, a warning | |
| 5883 is issued stating that access to the debugger is denied, unless | |
| 5884 INHIBIT_WARNING_ISSUE has also been supplied. This is useful when | |
| 5885 calling Lisp code inside redisplay, in menu callbacks, etc. because | |
| 5886 in such cases either the display is in an inconsistent state or | |
| 5887 doing window operations is explicitly forbidden by the OS, and the | |
| 5888 debugger would causes visual changes on the screen and might create | |
| 5889 another frame. | |
| 5890 | |
| 5891 If FLAGS contains INHIBIT_ANY_CHANGE_AFFECTING_REDISPLAY, no | |
| 5892 changes of any sort to extents, faces, glyphs, buffer text, | |
| 5893 specifiers relating to display, other variables relating to | |
| 5894 display, splitting, deleting, or resizing windows or frames, | |
| 5895 deleting buffers, windows, frames, devices, or consoles, etc. is | |
| 5896 allowed. This is for things called absolutely in the middle of | |
| 5897 redisplay, which expects things to be *exactly* the same after the | |
| 5898 call as before. This isn't completely implemented and needs to be | |
| 5899 thought out some more to determine exactly what its semantics are. | |
| 5900 For the moment, turning on this flag also turns on | |
| 5901 | |
| 5902 INHIBIT_EXISTING_PERMANENT_DISPLAY_OBJECT_DELETION | |
| 5903 INHIBIT_EXISTING_BUFFER_TEXT_MODIFICATION | |
| 5904 INHIBIT_ENTERING_DEBUGGER | |
| 5905 INHIBIT_WARNING_ISSUE | |
| 5906 INHIBIT_GC | |
| 5907 | |
| 5908 #### The following five flags are defined, but unimplemented: | |
| 5909 | |
| 5910 #define INHIBIT_EXISTING_CODING_SYSTEM_DELETION (1<<6) | |
| 5911 #define INHIBIT_EXISTING_CHARSET_DELETION (1<<7) | |
| 5912 #define INHIBIT_PERMANENT_DISPLAY_OBJECT_CREATION (1<<8) | |
| 5913 #define INHIBIT_CODING_SYSTEM_CREATION (1<<9) | |
| 5914 #define INHIBIT_CHARSET_CREATION (1<<10) | |
| 5915 | |
| 5916 FLAGS containing CALL_WITH_SUSPENDED_ERRORS is a sign that | |
| 5917 call_with_suspended_errors() was invoked. This exists only for | |
| 5918 debugging purposes -- often we want to break when a signal happens, | |
| 5919 but ignore signals from call_with_suspended_errors(), because they | |
| 5920 occur often and for legitimate reasons. | |
| 5921 | |
| 5922 If PROBLEM is non-zero, it should be a pointer to a structure into | |
| 5923 which exact information about any occurring problems (either an | |
| 5924 error or an attempted throw past this boundary). | |
| 5925 | |
| 5926 If a problem occurred and aborted operation (error, quit, or | |
| 5927 invalid throw), Qunbound is returned. Otherwise the return value | |
| 5928 from the call to (*fun) (arg) is returned. */ | |
| 5929 | |
| 5930 Lisp_Object | |
| 5931 call_trapping_problems (Lisp_Object warning_class, | |
| 867 | 5932 const CIbyte *warning_string, |
| 853 | 5933 int flags, |
| 5934 struct call_trapping_problems_result *problem, | |
| 5935 Lisp_Object (*fun) (void *), | |
| 5936 void *arg) | |
| 5937 { | |
| 1318 | 5938 int speccount = specpdl_depth (); |
| 853 | 5939 struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
| 5940 struct call_trapping_problems package; | |
| 1333 | 5941 struct call_trapping_problems_result real_problem; |
| 2532 | 5942 Lisp_Object opaque, thrown_tag, tem, thrown_backtrace; |
| 853 | 5943 int thrown = 0; |
| 5944 | |
| 5945 assert (SYMBOLP (warning_class)); /* sanity-check */ | |
| 5946 assert (!NILP (warning_class)); | |
| 5947 | |
| 5948 flags ^= INTERNAL_INHIBIT_ERRORS | INTERNAL_INHIBIT_THROWS; | |
| 5949 | |
| 5950 package.warning_class = warning_class; | |
| 5951 package.warning_string = warning_string; | |
| 5952 package.fun = fun; | |
| 5953 package.arg = arg; | |
| 5954 package.catchtag = | |
| 5955 flags & INTERNAL_INHIBIT_THROWS ? Vcatch_everything_tag : | |
| 5956 flags & INTERNAL_INHIBIT_ERRORS ? make_opaque_ptr (0) : | |
| 5957 Qnil; | |
| 5958 package.error_conditions = Qnil; | |
| 5959 package.data = Qnil; | |
| 5960 package.backtrace = Qnil; | |
| 5961 | |
| 1318 | 5962 flags = set_trapping_problems_flags (flags); |
| 853 | 5963 |
| 5964 if (flags & (INTERNAL_INHIBIT_THROWS | INTERNAL_INHIBIT_ERRORS)) | |
| 5965 opaque = make_opaque_ptr (&package); | |
| 5966 else | |
| 5967 opaque = Qnil; | |
| 5968 | |
| 5969 GCPRO5 (package.catchtag, package.error_conditions, package.data, | |
| 5970 package.backtrace, opaque); | |
| 5971 | |
| 5972 if (flags & INTERNAL_INHIBIT_ERRORS) | |
| 5973 /* We need a catch so that our condition-handler can throw back here | |
| 5974 after printing the warning. (We print the warning in the stack | |
| 5975 context of the error, so we can get a backtrace.) */ | |
| 5976 tem = internal_catch (package.catchtag, call_trapping_problems_1, opaque, | |
| 2532 | 5977 &thrown, &thrown_tag, &thrown_backtrace); |
| 853 | 5978 else if (flags & INTERNAL_INHIBIT_THROWS) |
| 5979 /* We skip over the first wrapper, which traps errors. */ | |
| 5980 tem = internal_catch (package.catchtag, call_trapping_problems_2, opaque, | |
| 2532 | 5981 &thrown, &thrown_tag, &thrown_backtrace); |
| 853 | 5982 else |
| 5983 /* Nothing special. */ | |
| 5984 tem = (fun) (arg); | |
| 5985 | |
| 1333 | 5986 if (!problem) |
| 5987 problem = &real_problem; | |
| 5988 | |
| 5989 if (!thrown) | |
| 853 | 5990 { |
| 1333 | 5991 problem->caught_error = 0; |
| 5992 problem->caught_throw = 0; | |
| 5993 problem->error_conditions = Qnil; | |
| 5994 problem->data = Qnil; | |
| 5995 problem->backtrace = Qnil; | |
| 5996 problem->thrown_tag = Qnil; | |
| 5997 problem->thrown_value = Qnil; | |
| 853 | 5998 } |
| 1333 | 5999 else if (EQ (thrown_tag, package.catchtag)) |
| 853 | 6000 { |
| 1333 | 6001 problem->caught_error = 1; |
| 6002 problem->caught_throw = 0; | |
| 6003 problem->error_conditions = package.error_conditions; | |
| 6004 problem->data = package.data; | |
| 6005 problem->backtrace = package.backtrace; | |
| 6006 problem->thrown_tag = Qnil; | |
| 6007 problem->thrown_value = Qnil; | |
| 853 | 6008 } |
| 1333 | 6009 else |
| 6010 { | |
| 6011 problem->caught_error = 0; | |
| 6012 problem->caught_throw = 1; | |
| 6013 problem->error_conditions = Qnil; | |
| 6014 problem->data = Qnil; | |
| 2532 | 6015 problem->backtrace = thrown_backtrace; |
| 1333 | 6016 problem->thrown_tag = thrown_tag; |
| 6017 problem->thrown_value = tem; | |
| 6018 } | |
| 6019 | |
| 6020 if (!(flags & INHIBIT_WARNING_ISSUE) && !(flags & POSTPONE_WARNING_ISSUE)) | |
| 6021 issue_call_trapping_problems_warning (warning_class, warning_string, | |
| 6022 problem); | |
| 853 | 6023 |
| 6024 if (!NILP (package.catchtag) && | |
| 6025 !EQ (package.catchtag, Vcatch_everything_tag)) | |
| 6026 free_opaque_ptr (package.catchtag); | |
| 6027 | |
| 6028 if (!NILP (opaque)) | |
| 6029 free_opaque_ptr (opaque); | |
| 6030 | |
| 6031 unbind_to (speccount); | |
| 6032 RETURN_UNGCPRO (thrown ? Qunbound : tem); | |
| 6033 } | |
| 6034 | |
| 6035 struct va_call_trapping_problems | |
| 6036 { | |
| 6037 lisp_fn_t fun; | |
| 6038 int nargs; | |
| 6039 Lisp_Object *args; | |
| 6040 }; | |
| 6041 | |
| 6042 static Lisp_Object | |
| 6043 va_call_trapping_problems_1 (void *ai_mi_madre) | |
| 6044 { | |
| 6045 struct va_call_trapping_problems *ai_no_corrida = | |
| 6046 (struct va_call_trapping_problems *) ai_mi_madre; | |
| 6047 Lisp_Object pegar_no_bumbum; | |
| 6048 | |
| 6049 PRIMITIVE_FUNCALL (pegar_no_bumbum, ai_no_corrida->fun, | |
| 6050 ai_no_corrida->args, ai_no_corrida->nargs); | |
| 6051 return pegar_no_bumbum; | |
| 6052 } | |
| 6053 | |
| 6054 /* #### document me. */ | |
| 6055 | |
| 6056 Lisp_Object | |
| 6057 va_call_trapping_problems (Lisp_Object warning_class, | |
| 867 | 6058 const CIbyte *warning_string, |
| 853 | 6059 int flags, |
| 6060 struct call_trapping_problems_result *problem, | |
| 6061 lisp_fn_t fun, int nargs, ...) | |
| 6062 { | |
| 6063 va_list vargs; | |
| 6064 Lisp_Object args[20]; | |
| 6065 int i; | |
| 6066 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas; | |
| 6067 struct gcpro gcpro1; | |
| 6068 | |
| 6069 assert (nargs >= 0 && nargs < 20); | |
| 6070 | |
| 6071 va_start (vargs, nargs); | |
| 6072 for (i = 0; i < nargs; i++) | |
| 6073 args[i] = va_arg (vargs, Lisp_Object); | |
| 6074 va_end (vargs); | |
| 6075 | |
| 6076 fazer_invocacao_atrapalhando_problemas.fun = fun; | |
| 6077 fazer_invocacao_atrapalhando_problemas.nargs = nargs; | |
| 6078 fazer_invocacao_atrapalhando_problemas.args = args; | |
| 6079 | |
| 6080 GCPRO1_ARRAY (args, nargs); | |
| 6081 RETURN_UNGCPRO | |
| 6082 (call_trapping_problems | |
| 6083 (warning_class, warning_string, flags, problem, | |
| 6084 va_call_trapping_problems_1, &fazer_invocacao_atrapalhando_problemas)); | |
| 6085 } | |
| 6086 | |
| 6087 /* this is an older interface, barely different from | |
| 6088 va_call_trapping_problems. | |
| 6089 | |
| 6090 #### eliminate this or at least merge the ERROR_BEHAVIOR stuff into | |
| 6091 va_call_trapping_problems(). */ | |
| 6092 | |
| 6093 Lisp_Object | |
| 6094 call_with_suspended_errors (lisp_fn_t fun, Lisp_Object retval, | |
| 1204 | 6095 Lisp_Object class_, Error_Behavior errb, |
| 853 | 6096 int nargs, ...) |
| 6097 { | |
| 6098 va_list vargs; | |
| 6099 Lisp_Object args[20]; | |
| 6100 int i; | |
| 6101 struct va_call_trapping_problems fazer_invocacao_atrapalhando_problemas; | |
| 6102 int flags; | |
| 6103 struct gcpro gcpro1; | |
| 6104 | |
| 1204 | 6105 assert (SYMBOLP (class_)); /* sanity-check */ |
| 6106 assert (!NILP (class_)); | |
| 853 | 6107 assert (nargs >= 0 && nargs < 20); |
| 6108 | |
| 6109 va_start (vargs, nargs); | |
| 6110 for (i = 0; i < nargs; i++) | |
| 6111 args[i] = va_arg (vargs, Lisp_Object); | |
| 6112 va_end (vargs); | |
| 6113 | |
| 6114 /* If error-checking is not disabled, just call the function. */ | |
| 6115 | |
| 6116 if (ERRB_EQ (errb, ERROR_ME)) | |
| 6117 { | |
| 6118 Lisp_Object val; | |
| 6119 PRIMITIVE_FUNCALL (val, fun, args, nargs); | |
| 6120 return val; | |
| 6121 } | |
| 6122 | |
| 6123 if (ERRB_EQ (errb, ERROR_ME_NOT)) /* person wants no warnings */ | |
| 6124 flags = INHIBIT_WARNING_ISSUE | INHIBIT_ENTERING_DEBUGGER; | |
| 6125 else if (ERRB_EQ (errb, ERROR_ME_DEBUG_WARN)) | |
| 6126 flags = ISSUE_WARNINGS_AT_DEBUG_LEVEL | INHIBIT_ENTERING_DEBUGGER; | |
| 6127 else | |
| 6128 { | |
| 6129 assert (ERRB_EQ (errb, ERROR_ME_WARN)); | |
| 6130 flags = INHIBIT_ENTERING_DEBUGGER; | |
| 6131 } | |
| 6132 | |
| 6133 flags |= CALL_WITH_SUSPENDED_ERRORS; | |
| 6134 | |
| 6135 fazer_invocacao_atrapalhando_problemas.fun = fun; | |
| 6136 fazer_invocacao_atrapalhando_problemas.nargs = nargs; | |
| 6137 fazer_invocacao_atrapalhando_problemas.args = args; | |
| 6138 | |
| 6139 GCPRO1_ARRAY (args, nargs); | |
| 6140 { | |
| 6141 Lisp_Object its_way_too_goddamn_late = | |
| 6142 call_trapping_problems | |
| 1204 | 6143 (class_, 0, flags, 0, va_call_trapping_problems_1, |
| 853 | 6144 &fazer_invocacao_atrapalhando_problemas); |
| 6145 UNGCPRO; | |
| 6146 if (UNBOUNDP (its_way_too_goddamn_late)) | |
| 6147 return retval; | |
| 6148 else | |
| 6149 return its_way_too_goddamn_late; | |
| 6150 } | |
| 6151 } | |
| 6152 | |
| 6153 struct calln_trapping_problems | |
| 6154 { | |
| 6155 int nargs; | |
| 6156 Lisp_Object *args; | |
| 6157 }; | |
| 6158 | |
| 6159 static Lisp_Object | |
| 6160 calln_trapping_problems_1 (void *puta) | |
| 6161 { | |
| 6162 struct calln_trapping_problems *p = (struct calln_trapping_problems *) puta; | |
| 6163 | |
| 6164 return Ffuncall (p->nargs, p->args); | |
| 428 | 6165 } |
| 6166 | |
| 6167 static Lisp_Object | |
| 853 | 6168 calln_trapping_problems (Lisp_Object warning_class, |
| 867 | 6169 const CIbyte *warning_string, int flags, |
| 853 | 6170 struct call_trapping_problems_result *problem, |
| 6171 int nargs, Lisp_Object *args) | |
| 6172 { | |
| 6173 struct calln_trapping_problems foo; | |
| 6174 struct gcpro gcpro1; | |
| 6175 | |
| 6176 if (SYMBOLP (args[0])) | |
| 6177 { | |
| 6178 Lisp_Object tem = XSYMBOL (args[0])->function; | |
| 6179 if (NILP (tem) || UNBOUNDP (tem)) | |
| 6180 { | |
| 6181 if (problem) | |
| 6182 { | |
| 6183 problem->caught_error = 0; | |
| 6184 problem->caught_throw = 0; | |
| 6185 problem->error_conditions = Qnil; | |
| 6186 problem->data = Qnil; | |
| 6187 problem->backtrace = Qnil; | |
| 6188 problem->thrown_tag = Qnil; | |
| 6189 problem->thrown_value = Qnil; | |
| 6190 } | |
| 6191 return Qnil; | |
| 6192 } | |
| 6193 } | |
| 6194 | |
| 6195 foo.nargs = nargs; | |
| 6196 foo.args = args; | |
| 6197 | |
| 6198 GCPRO1_ARRAY (args, nargs); | |
| 6199 RETURN_UNGCPRO (call_trapping_problems (warning_class, warning_string, | |
| 6200 flags, problem, | |
| 6201 calln_trapping_problems_1, | |
| 6202 &foo)); | |
| 6203 } | |
| 6204 | |
| 6205 /* #### fix these functions to follow the calling convention of | |
| 6206 call_trapping_problems! */ | |
| 6207 | |
| 6208 Lisp_Object | |
| 867 | 6209 call0_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6210 int flags) |
| 6211 { | |
| 6212 return calln_trapping_problems (Qerror, warning_string, flags, 0, 1, | |
| 6213 &function); | |
| 428 | 6214 } |
| 6215 | |
| 6216 Lisp_Object | |
| 867 | 6217 call1_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6218 Lisp_Object object, int flags) |
| 6219 { | |
| 6220 Lisp_Object args[2]; | |
| 6221 | |
| 6222 args[0] = function; | |
| 6223 args[1] = object; | |
| 6224 | |
| 6225 return calln_trapping_problems (Qerror, warning_string, flags, 0, 2, | |
| 6226 args); | |
| 6227 } | |
| 6228 | |
| 6229 Lisp_Object | |
| 867 | 6230 call2_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6231 Lisp_Object object1, Lisp_Object object2, |
| 6232 int flags) | |
| 6233 { | |
| 6234 Lisp_Object args[3]; | |
| 6235 | |
| 6236 args[0] = function; | |
| 6237 args[1] = object1; | |
| 6238 args[2] = object2; | |
| 6239 | |
| 6240 return calln_trapping_problems (Qerror, warning_string, flags, 0, 3, | |
| 6241 args); | |
| 6242 } | |
| 6243 | |
| 6244 Lisp_Object | |
| 867 | 6245 call3_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6246 Lisp_Object object1, Lisp_Object object2, |
| 6247 Lisp_Object object3, int flags) | |
| 6248 { | |
| 6249 Lisp_Object args[4]; | |
| 6250 | |
| 6251 args[0] = function; | |
| 6252 args[1] = object1; | |
| 6253 args[2] = object2; | |
| 6254 args[3] = object3; | |
| 6255 | |
| 6256 return calln_trapping_problems (Qerror, warning_string, flags, 0, 4, | |
| 6257 args); | |
| 6258 } | |
| 6259 | |
| 6260 Lisp_Object | |
| 867 | 6261 call4_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6262 Lisp_Object object1, Lisp_Object object2, |
| 6263 Lisp_Object object3, Lisp_Object object4, | |
| 6264 int flags) | |
| 6265 { | |
| 6266 Lisp_Object args[5]; | |
| 6267 | |
| 6268 args[0] = function; | |
| 6269 args[1] = object1; | |
| 6270 args[2] = object2; | |
| 6271 args[3] = object3; | |
| 6272 args[4] = object4; | |
| 6273 | |
| 6274 return calln_trapping_problems (Qerror, warning_string, flags, 0, 5, | |
| 6275 args); | |
| 6276 } | |
| 6277 | |
| 6278 Lisp_Object | |
| 867 | 6279 call5_trapping_problems (const CIbyte *warning_string, Lisp_Object function, |
| 853 | 6280 Lisp_Object object1, Lisp_Object object2, |
| 6281 Lisp_Object object3, Lisp_Object object4, | |
| 6282 Lisp_Object object5, int flags) | |
| 6283 { | |
| 6284 Lisp_Object args[6]; | |
| 6285 | |
| 6286 args[0] = function; | |
| 6287 args[1] = object1; | |
| 6288 args[2] = object2; | |
| 6289 args[3] = object3; | |
| 6290 args[4] = object4; | |
| 6291 args[5] = object5; | |
| 6292 | |
| 6293 return calln_trapping_problems (Qerror, warning_string, flags, 0, 6, | |
| 6294 args); | |
| 6295 } | |
| 6296 | |
| 6297 struct eval_in_buffer_trapping_problems | |
| 6298 { | |
| 6299 struct buffer *buf; | |
| 6300 Lisp_Object form; | |
| 6301 }; | |
| 6302 | |
| 6303 static Lisp_Object | |
| 6304 eval_in_buffer_trapping_problems_1 (void *arg) | |
| 6305 { | |
| 6306 struct eval_in_buffer_trapping_problems *p = | |
| 6307 (struct eval_in_buffer_trapping_problems *) arg; | |
| 6308 | |
| 6309 return eval_in_buffer (p->buf, p->form); | |
| 6310 } | |
| 6311 | |
| 6312 /* #### fix these functions to follow the calling convention of | |
| 6313 call_trapping_problems! */ | |
| 6314 | |
| 6315 Lisp_Object | |
| 867 | 6316 eval_in_buffer_trapping_problems (const CIbyte *warning_string, |
| 853 | 6317 struct buffer *buf, Lisp_Object form, |
| 6318 int flags) | |
| 6319 { | |
| 6320 struct eval_in_buffer_trapping_problems p; | |
| 6321 Lisp_Object buffer = wrap_buffer (buf); | |
| 428 | 6322 struct gcpro gcpro1, gcpro2; |
| 6323 | |
| 853 | 6324 GCPRO2 (buffer, form); |
| 6325 p.buf = buf; | |
| 6326 p.form = form; | |
| 6327 RETURN_UNGCPRO (call_trapping_problems (Qerror, warning_string, flags, 0, | |
| 6328 eval_in_buffer_trapping_problems_1, | |
| 6329 &p)); | |
| 6330 } | |
| 6331 | |
| 6332 Lisp_Object | |
| 1333 | 6333 run_hook_trapping_problems (Lisp_Object warning_class, |
| 853 | 6334 Lisp_Object hook_symbol, |
| 6335 int flags) | |
| 6336 { | |
| 1333 | 6337 return run_hook_with_args_trapping_problems (warning_class, 1, &hook_symbol, |
| 853 | 6338 RUN_HOOKS_TO_COMPLETION, |
| 6339 flags); | |
| 428 | 6340 } |
| 6341 | |
| 6342 static Lisp_Object | |
| 853 | 6343 safe_run_hook_trapping_problems_1 (void *puta) |
| 6344 { | |
| 6345 Lisp_Object hook = VOID_TO_LISP (puta); | |
| 6346 | |
| 6347 run_hook (hook); | |
| 428 | 6348 return Qnil; |
| 6349 } | |
| 6350 | |
| 853 | 6351 /* Same as run_hook_trapping_problems() but also set the hook to nil |
| 6352 if an error occurs (but not a quit). */ | |
| 6353 | |
| 428 | 6354 Lisp_Object |
| 1333 | 6355 safe_run_hook_trapping_problems (Lisp_Object warning_class, |
| 6356 Lisp_Object hook_symbol, int flags) | |
| 853 | 6357 { |
| 428 | 6358 Lisp_Object tem; |
| 853 | 6359 struct gcpro gcpro1, gcpro2; |
| 6360 struct call_trapping_problems_result prob; | |
| 428 | 6361 |
| 6362 if (!initialized || preparing_for_armageddon) | |
| 6363 return Qnil; | |
| 6364 tem = find_symbol_value (hook_symbol); | |
| 6365 if (NILP (tem) || UNBOUNDP (tem)) | |
| 6366 return Qnil; | |
| 6367 | |
| 853 | 6368 GCPRO2 (hook_symbol, tem); |
| 1333 | 6369 tem = call_trapping_problems (Qerror, NULL, |
| 6370 flags | POSTPONE_WARNING_ISSUE, | |
| 853 | 6371 &prob, |
| 6372 safe_run_hook_trapping_problems_1, | |
| 6373 LISP_TO_VOID (hook_symbol)); | |
| 1333 | 6374 { |
| 6375 Lisp_Object hook_name = XSYMBOL_NAME (hook_symbol); | |
| 6376 Ibyte *hook_str = XSTRING_DATA (hook_name); | |
| 6377 Ibyte *err = alloca_ibytes (XSTRING_LENGTH (hook_name) + 100); | |
| 6378 | |
| 6379 if (prob.caught_throw || (prob.caught_error && !EQ (prob.error_conditions, | |
| 6380 Qquit))) | |
| 6381 { | |
| 6382 Fset (hook_symbol, Qnil); | |
| 6383 qxesprintf (err, "Error in `%s' (resetting to nil)", hook_str); | |
| 6384 } | |
| 6385 else | |
| 6386 qxesprintf (err, "Quit in `%s'", hook_str); | |
| 6387 | |
| 6388 | |
| 6389 issue_call_trapping_problems_warning (warning_class, (CIbyte *) err, | |
| 6390 &prob); | |
| 6391 } | |
| 6392 | |
| 6393 UNGCPRO; | |
| 6394 return tem; | |
| 853 | 6395 } |
| 6396 | |
| 6397 struct run_hook_with_args_in_buffer_trapping_problems | |
| 6398 { | |
| 6399 struct buffer *buf; | |
| 6400 int nargs; | |
| 6401 Lisp_Object *args; | |
| 6402 enum run_hooks_condition cond; | |
| 6403 }; | |
| 6404 | |
| 6405 static Lisp_Object | |
| 6406 run_hook_with_args_in_buffer_trapping_problems_1 (void *puta) | |
| 6407 { | |
| 6408 struct run_hook_with_args_in_buffer_trapping_problems *porra = | |
| 6409 (struct run_hook_with_args_in_buffer_trapping_problems *) puta; | |
| 6410 | |
| 6411 return run_hook_with_args_in_buffer (porra->buf, porra->nargs, porra->args, | |
| 6412 porra->cond); | |
| 6413 } | |
| 6414 | |
| 6415 /* #### fix these functions to follow the calling convention of | |
| 6416 call_trapping_problems! */ | |
| 428 | 6417 |
| 6418 Lisp_Object | |
| 1333 | 6419 run_hook_with_args_in_buffer_trapping_problems (Lisp_Object warning_class, |
| 853 | 6420 struct buffer *buf, int nargs, |
| 6421 Lisp_Object *args, | |
| 6422 enum run_hooks_condition cond, | |
| 6423 int flags) | |
| 6424 { | |
| 6425 Lisp_Object sym, val, ret; | |
| 6426 struct run_hook_with_args_in_buffer_trapping_problems diversity_and_distrust; | |
| 428 | 6427 struct gcpro gcpro1; |
| 1333 | 6428 Lisp_Object hook_name; |
| 6429 Ibyte *hook_str; | |
| 6430 Ibyte *err; | |
| 428 | 6431 |
| 6432 if (!initialized || preparing_for_armageddon) | |
| 853 | 6433 /* We need to bail out of here pronto. */ |
| 428 | 6434 return Qnil; |
| 6435 | |
| 853 | 6436 GCPRO1_ARRAY (args, nargs); |
| 6437 | |
| 6438 sym = args[0]; | |
| 6439 val = symbol_value_in_buffer (sym, wrap_buffer (buf)); | |
| 6440 ret = (cond == RUN_HOOKS_UNTIL_FAILURE ? Qt : Qnil); | |
| 6441 | |
| 6442 if (UNBOUNDP (val) || NILP (val)) | |
| 6443 RETURN_UNGCPRO (ret); | |
| 6444 | |
| 6445 diversity_and_distrust.buf = buf; | |
| 6446 diversity_and_distrust.nargs = nargs; | |
| 6447 diversity_and_distrust.args = args; | |
| 6448 diversity_and_distrust.cond = cond; | |
| 6449 | |
| 1333 | 6450 hook_name = XSYMBOL_NAME (args[0]); |
| 6451 hook_str = XSTRING_DATA (hook_name); | |
| 6452 err = alloca_ibytes (XSTRING_LENGTH (hook_name) + 100); | |
| 6453 qxesprintf (err, "Error in `%s'", hook_str); | |
| 853 | 6454 RETURN_UNGCPRO |
| 6455 (call_trapping_problems | |
| 1333 | 6456 (warning_class, (CIbyte *) err, flags, 0, |
| 853 | 6457 run_hook_with_args_in_buffer_trapping_problems_1, |
| 6458 &diversity_and_distrust)); | |
| 428 | 6459 } |
| 6460 | |
| 6461 Lisp_Object | |
| 1333 | 6462 run_hook_with_args_trapping_problems (Lisp_Object warning_class, |
| 853 | 6463 int nargs, |
| 6464 Lisp_Object *args, | |
| 6465 enum run_hooks_condition cond, | |
| 6466 int flags) | |
| 6467 { | |
| 6468 return run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6469 (warning_class, current_buffer, nargs, args, cond, flags); |
| 428 | 6470 } |
| 6471 | |
| 6472 Lisp_Object | |
| 1333 | 6473 va_run_hook_with_args_trapping_problems (Lisp_Object warning_class, |
| 853 | 6474 Lisp_Object hook_var, |
| 6475 int nargs, ...) | |
| 6476 { | |
| 6477 /* This function can GC */ | |
| 6478 struct gcpro gcpro1; | |
| 6479 int i; | |
| 6480 va_list vargs; | |
| 6481 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 6482 int flags; | |
| 6483 | |
| 6484 va_start (vargs, nargs); | |
| 6485 funcall_args[0] = hook_var; | |
| 6486 for (i = 0; i < nargs; i++) | |
| 6487 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 6488 flags = va_arg (vargs, int); | |
| 6489 va_end (vargs); | |
| 6490 | |
| 6491 GCPRO1_ARRAY (funcall_args, nargs + 1); | |
| 6492 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6493 (warning_class, current_buffer, nargs + 1, funcall_args, |
| 853 | 6494 RUN_HOOKS_TO_COMPLETION, flags)); |
| 428 | 6495 } |
| 6496 | |
| 6497 Lisp_Object | |
| 1333 | 6498 va_run_hook_with_args_in_buffer_trapping_problems (Lisp_Object warning_class, |
| 853 | 6499 struct buffer *buf, |
| 6500 Lisp_Object hook_var, | |
| 6501 int nargs, ...) | |
| 6502 { | |
| 6503 /* This function can GC */ | |
| 6504 struct gcpro gcpro1; | |
| 6505 int i; | |
| 6506 va_list vargs; | |
| 6507 Lisp_Object *funcall_args = alloca_array (Lisp_Object, 1 + nargs); | |
| 6508 int flags; | |
| 6509 | |
| 6510 va_start (vargs, nargs); | |
| 6511 funcall_args[0] = hook_var; | |
| 6512 for (i = 0; i < nargs; i++) | |
| 6513 funcall_args[i + 1] = va_arg (vargs, Lisp_Object); | |
| 6514 flags = va_arg (vargs, int); | |
| 6515 va_end (vargs); | |
| 6516 | |
| 6517 GCPRO1_ARRAY (funcall_args, nargs + 1); | |
| 6518 RETURN_UNGCPRO (run_hook_with_args_in_buffer_trapping_problems | |
| 1333 | 6519 (warning_class, buf, nargs + 1, funcall_args, |
| 853 | 6520 RUN_HOOKS_TO_COMPLETION, flags)); |
| 428 | 6521 } |
| 6522 | |
| 6523 | |
| 6524 /************************************************************************/ | |
| 6525 /* The special binding stack */ | |
| 771 | 6526 /* Most C code should simply use specbind() and unbind_to_1(). */ |
| 428 | 6527 /* When performance is critical, use the macros in backtrace.h. */ |
| 6528 /************************************************************************/ | |
| 6529 | |
| 6530 #define min_max_specpdl_size 400 | |
| 6531 | |
| 6532 void | |
| 647 | 6533 grow_specpdl (EMACS_INT reserved) |
| 6534 { | |
| 6535 EMACS_INT size_needed = specpdl_depth() + reserved; | |
| 428 | 6536 if (size_needed >= max_specpdl_size) |
| 6537 { | |
| 6538 if (max_specpdl_size < min_max_specpdl_size) | |
| 6539 max_specpdl_size = min_max_specpdl_size; | |
| 6540 if (size_needed >= max_specpdl_size) | |
| 6541 { | |
| 1951 | 6542 /* Leave room for some specpdl in the debugger. */ |
| 6543 max_specpdl_size = size_needed + 100; | |
| 6544 if (max_specpdl_size > specpdl_size) | |
| 6545 { | |
| 6546 specpdl_size = max_specpdl_size; | |
| 6547 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size); | |
| 6548 specpdl_ptr = specpdl + specpdl_depth(); | |
| 6549 } | |
| 563 | 6550 signal_continuable_error |
| 6551 (Qstack_overflow, | |
| 6552 "Variable binding depth exceeds max-specpdl-size", Qunbound); | |
| 428 | 6553 } |
| 6554 } | |
| 6555 while (specpdl_size < size_needed) | |
| 6556 { | |
| 6557 specpdl_size *= 2; | |
| 6558 if (specpdl_size > max_specpdl_size) | |
| 6559 specpdl_size = max_specpdl_size; | |
| 6560 } | |
| 6561 XREALLOC_ARRAY (specpdl, struct specbinding, specpdl_size); | |
| 6562 specpdl_ptr = specpdl + specpdl_depth(); | |
| 853 | 6563 check_specbind_stack_sanity (); |
| 428 | 6564 } |
| 6565 | |
| 6566 | |
| 6567 /* Handle unbinding buffer-local variables */ | |
| 6568 static Lisp_Object | |
| 6569 specbind_unwind_local (Lisp_Object ovalue) | |
| 6570 { | |
| 6571 Lisp_Object current = Fcurrent_buffer (); | |
| 6572 Lisp_Object symbol = specpdl_ptr->symbol; | |
| 853 | 6573 Lisp_Object victim = ovalue; |
| 6574 Lisp_Object buf = get_buffer (XCAR (victim), 0); | |
| 6575 ovalue = XCDR (victim); | |
| 428 | 6576 |
| 6577 free_cons (victim); | |
| 6578 | |
| 6579 if (NILP (buf)) | |
| 6580 { | |
| 6581 /* Deleted buffer -- do nothing */ | |
| 6582 } | |
| 6583 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buf)) == 0) | |
| 6584 { | |
| 6585 /* Was buffer-local when binding was made, now no longer is. | |
| 6586 * (kill-local-variable can do this.) | |
| 6587 * Do nothing in this case. | |
| 6588 */ | |
| 6589 } | |
| 6590 else if (EQ (buf, current)) | |
| 6591 Fset (symbol, ovalue); | |
| 6592 else | |
| 6593 { | |
| 6594 /* Urk! Somebody switched buffers */ | |
| 6595 struct gcpro gcpro1; | |
| 6596 GCPRO1 (current); | |
| 6597 Fset_buffer (buf); | |
| 6598 Fset (symbol, ovalue); | |
| 6599 Fset_buffer (current); | |
| 6600 UNGCPRO; | |
| 6601 } | |
| 6602 return symbol; | |
| 6603 } | |
| 6604 | |
| 6605 static Lisp_Object | |
| 6606 specbind_unwind_wasnt_local (Lisp_Object buffer) | |
| 6607 { | |
| 6608 Lisp_Object current = Fcurrent_buffer (); | |
| 6609 Lisp_Object symbol = specpdl_ptr->symbol; | |
| 6610 | |
| 6611 buffer = get_buffer (buffer, 0); | |
| 6612 if (NILP (buffer)) | |
| 6613 { | |
| 6614 /* Deleted buffer -- do nothing */ | |
| 6615 } | |
| 6616 else if (symbol_value_buffer_local_info (symbol, XBUFFER (buffer)) == 0) | |
| 6617 { | |
| 6618 /* Was buffer-local when binding was made, now no longer is. | |
| 6619 * (kill-local-variable can do this.) | |
| 6620 * Do nothing in this case. | |
| 6621 */ | |
| 6622 } | |
| 6623 else if (EQ (buffer, current)) | |
| 6624 Fkill_local_variable (symbol); | |
| 6625 else | |
| 6626 { | |
| 6627 /* Urk! Somebody switched buffers */ | |
| 6628 struct gcpro gcpro1; | |
| 6629 GCPRO1 (current); | |
| 6630 Fset_buffer (buffer); | |
| 6631 Fkill_local_variable (symbol); | |
| 6632 Fset_buffer (current); | |
| 6633 UNGCPRO; | |
| 6634 } | |
| 6635 return symbol; | |
| 6636 } | |
| 6637 | |
| 6638 | |
| 6639 void | |
| 6640 specbind (Lisp_Object symbol, Lisp_Object value) | |
| 6641 { | |
| 6642 SPECBIND (symbol, value); | |
| 853 | 6643 |
| 6644 check_specbind_stack_sanity (); | |
| 428 | 6645 } |
| 6646 | |
| 6647 void | |
| 6648 specbind_magic (Lisp_Object symbol, Lisp_Object value) | |
| 6649 { | |
| 6650 int buffer_local = | |
| 6651 symbol_value_buffer_local_info (symbol, current_buffer); | |
| 6652 | |
| 6653 if (buffer_local == 0) | |
| 6654 { | |
| 6655 specpdl_ptr->old_value = find_symbol_value (symbol); | |
| 771 | 6656 specpdl_ptr->func = 0; /* Handled specially by unbind_to_1 */ |
| 428 | 6657 } |
| 6658 else if (buffer_local > 0) | |
| 6659 { | |
| 6660 /* Already buffer-local */ | |
| 6661 specpdl_ptr->old_value = noseeum_cons (Fcurrent_buffer (), | |
| 6662 find_symbol_value (symbol)); | |
| 6663 specpdl_ptr->func = specbind_unwind_local; | |
| 6664 } | |
| 6665 else | |
| 6666 { | |
| 6667 /* About to become buffer-local */ | |
| 6668 specpdl_ptr->old_value = Fcurrent_buffer (); | |
| 6669 specpdl_ptr->func = specbind_unwind_wasnt_local; | |
| 6670 } | |
| 6671 | |
| 6672 specpdl_ptr->symbol = symbol; | |
| 6673 specpdl_ptr++; | |
| 6674 specpdl_depth_counter++; | |
| 6675 | |
| 6676 Fset (symbol, value); | |
| 853 | 6677 |
| 6678 check_specbind_stack_sanity (); | |
| 428 | 6679 } |
| 6680 | |
| 771 | 6681 /* Record an unwind-protect -- FUNCTION will be called with ARG no matter |
| 6682 whether a normal or non-local exit occurs. (You need to call unbind_to_1() | |
| 6683 before your function returns normally, passing in the integer returned | |
| 6684 by this function.) Note: As long as the unwind-protect exists, ARG is | |
| 6685 automatically GCPRO'd. The return value from FUNCTION is completely | |
| 6686 ignored. #### We should eliminate it entirely. */ | |
| 6687 | |
| 6688 int | |
| 428 | 6689 record_unwind_protect (Lisp_Object (*function) (Lisp_Object arg), |
| 6690 Lisp_Object arg) | |
| 6691 { | |
| 6692 SPECPDL_RESERVE (1); | |
| 6693 specpdl_ptr->func = function; | |
| 6694 specpdl_ptr->symbol = Qnil; | |
| 6695 specpdl_ptr->old_value = arg; | |
| 6696 specpdl_ptr++; | |
| 6697 specpdl_depth_counter++; | |
| 853 | 6698 check_specbind_stack_sanity (); |
| 771 | 6699 return specpdl_depth_counter - 1; |
| 6700 } | |
| 6701 | |
| 6702 static Lisp_Object | |
| 802 | 6703 restore_lisp_object (Lisp_Object cons) |
| 6704 { | |
| 6705 Lisp_Object opaque = XCAR (cons); | |
| 6706 Lisp_Object *addr = (Lisp_Object *) get_opaque_ptr (opaque); | |
| 6707 *addr = XCDR (cons); | |
| 6708 free_opaque_ptr (opaque); | |
| 853 | 6709 free_cons (cons); |
| 802 | 6710 return Qnil; |
| 6711 } | |
| 6712 | |
| 6713 /* Establish an unwind-protect which will restore the Lisp_Object pointed to | |
| 6714 by ADDR with the value VAL. */ | |
| 814 | 6715 static int |
| 802 | 6716 record_unwind_protect_restoring_lisp_object (Lisp_Object *addr, |
| 6717 Lisp_Object val) | |
| 6718 { | |
| 6719 Lisp_Object opaque = make_opaque_ptr (addr); | |
| 6720 return record_unwind_protect (restore_lisp_object, | |
| 6721 noseeum_cons (opaque, val)); | |
| 6722 } | |
| 6723 | |
| 6724 /* Similar to specbind() but for any C variable whose value is a | |
| 6725 Lisp_Object. Sets up an unwind-protect to restore the variable | |
| 6726 pointed to by ADDR to its existing value, and then changes its | |
| 6727 value to NEWVAL. Returns the previous value of specpdl_depth(); | |
| 6728 pass this to unbind_to() after you are done. */ | |
| 6729 int | |
| 6730 internal_bind_lisp_object (Lisp_Object *addr, Lisp_Object newval) | |
| 6731 { | |
| 6732 int count = specpdl_depth (); | |
| 6733 record_unwind_protect_restoring_lisp_object (addr, *addr); | |
| 6734 *addr = newval; | |
| 6735 return count; | |
| 6736 } | |
| 6737 | |
| 6738 static Lisp_Object | |
| 6739 restore_int (Lisp_Object cons) | |
| 6740 { | |
| 6741 Lisp_Object opaque = XCAR (cons); | |
| 6742 Lisp_Object lval = XCDR (cons); | |
| 6743 int *addr = (int *) get_opaque_ptr (opaque); | |
| 6744 int val; | |
| 6745 | |
| 4025 | 6746 /* In the event that a C integer will always fit in an Emacs int, we |
| 6747 haven't ever stored a C integer as an opaque pointer. This #ifdef | |
| 6748 eliminates a warning on AMD 64, where EMACS_INT has 63 value bits and C | |
| 6749 integers have 32 value bits. */ | |
| 6750 #if INT_VALBITS < INTBITS | |
| 802 | 6751 if (INTP (lval)) |
| 4025 | 6752 { |
| 6753 val = XINT (lval); | |
| 6754 } | |
| 802 | 6755 else |
| 6756 { | |
| 6757 val = (int) get_opaque_ptr (lval); | |
| 6758 free_opaque_ptr (lval); | |
| 6759 } | |
| 4025 | 6760 #else /* !(INT_VALBITS < INTBITS) */ |
| 6761 val = XINT(lval); | |
| 6762 #endif /* INT_VALBITS < INTBITS */ | |
| 802 | 6763 |
| 6764 *addr = val; | |
| 6765 free_opaque_ptr (opaque); | |
| 853 | 6766 free_cons (cons); |
| 802 | 6767 return Qnil; |
| 6768 } | |
| 6769 | |
| 6770 /* Establish an unwind-protect which will restore the int pointed to | |
| 6771 by ADDR with the value VAL. This function works correctly with | |
| 6772 all ints, even those that don't fit into a Lisp integer. */ | |
| 1333 | 6773 int |
| 802 | 6774 record_unwind_protect_restoring_int (int *addr, int val) |
| 6775 { | |
| 6776 Lisp_Object opaque = make_opaque_ptr (addr); | |
| 6777 Lisp_Object lval; | |
| 6778 | |
| 4025 | 6779 /* In the event that a C integer will always fit in an Emacs int, we don't |
| 6780 ever want to store a C integer as an opaque pointer. This #ifdef | |
| 6781 eliminates a warning on AMD 64, where EMACS_INT has 63 value bits and C | |
| 6782 integers have 32 value bits. */ | |
| 6783 #if INT_VALBITS <= INTBITS | |
| 802 | 6784 if (NUMBER_FITS_IN_AN_EMACS_INT (val)) |
| 6785 lval = make_int (val); | |
| 6786 else | |
| 6787 lval = make_opaque_ptr ((void *) val); | |
| 4025 | 6788 #else /* !(INT_VALBITS < INTBITS) */ |
| 6789 lval = make_int (val); | |
| 6790 #endif /* INT_VALBITS <= INTBITS */ | |
| 6791 | |
| 802 | 6792 return record_unwind_protect (restore_int, noseeum_cons (opaque, lval)); |
| 6793 } | |
| 6794 | |
| 6795 /* Similar to specbind() but for any C variable whose value is an int. | |
| 6796 Sets up an unwind-protect to restore the variable pointed to by | |
| 6797 ADDR to its existing value, and then changes its value to NEWVAL. | |
| 6798 Returns the previous value of specpdl_depth(); pass this to | |
| 6799 unbind_to() after you are done. This function works correctly with | |
| 6800 all ints, even those that don't fit into a Lisp integer. */ | |
| 6801 int | |
| 6802 internal_bind_int (int *addr, int newval) | |
| 6803 { | |
| 6804 int count = specpdl_depth (); | |
| 6805 record_unwind_protect_restoring_int (addr, *addr); | |
| 6806 *addr = newval; | |
| 6807 return count; | |
| 6808 } | |
| 6809 | |
| 6810 static Lisp_Object | |
| 771 | 6811 free_pointer (Lisp_Object opaque) |
| 6812 { | |
| 1726 | 6813 xfree (get_opaque_ptr (opaque), void *); |
| 771 | 6814 free_opaque_ptr (opaque); |
| 6815 return Qnil; | |
| 6816 } | |
| 6817 | |
| 6818 /* Establish an unwind-protect which will free the specified block. | |
| 6819 */ | |
| 6820 int | |
| 6821 record_unwind_protect_freeing (void *ptr) | |
| 6822 { | |
| 6823 Lisp_Object opaque = make_opaque_ptr (ptr); | |
| 6824 return record_unwind_protect (free_pointer, opaque); | |
| 6825 } | |
| 6826 | |
| 6827 static Lisp_Object | |
| 6828 free_dynarr (Lisp_Object opaque) | |
| 6829 { | |
| 6830 Dynarr_free (get_opaque_ptr (opaque)); | |
| 6831 free_opaque_ptr (opaque); | |
| 6832 return Qnil; | |
| 6833 } | |
| 6834 | |
| 6835 int | |
| 6836 record_unwind_protect_freeing_dynarr (void *ptr) | |
| 6837 { | |
| 6838 Lisp_Object opaque = make_opaque_ptr (ptr); | |
| 6839 return record_unwind_protect (free_dynarr, opaque); | |
| 6840 } | |
| 428 | 6841 |
| 6842 /* Unwind the stack till specpdl_depth() == COUNT. | |
| 6843 VALUE is not used, except that, purely as a convenience to the | |
| 771 | 6844 caller, it is protected from garbage-protection and returned. */ |
| 428 | 6845 Lisp_Object |
| 771 | 6846 unbind_to_1 (int count, Lisp_Object value) |
| 428 | 6847 { |
| 6848 UNBIND_TO_GCPRO (count, value); | |
| 853 | 6849 check_specbind_stack_sanity (); |
| 428 | 6850 return value; |
| 6851 } | |
| 6852 | |
| 6853 /* Don't call this directly. | |
| 6854 Only for use by UNBIND_TO* macros in backtrace.h */ | |
| 6855 void | |
| 6856 unbind_to_hairy (int count) | |
| 6857 { | |
| 442 | 6858 ++specpdl_ptr; |
| 6859 ++specpdl_depth_counter; | |
| 6860 | |
| 428 | 6861 while (specpdl_depth_counter != count) |
| 6862 { | |
| 1313 | 6863 Lisp_Object oquit = Qunbound; |
| 6864 | |
| 6865 /* Do this check BEFORE decrementing the values below, because once | |
| 6866 they're decremented, GC protection is lost on | |
| 6867 specpdl_ptr->old_value. */ | |
| 1322 | 6868 if (specpdl_ptr[-1].func == Fprogn) |
| 1313 | 6869 { |
| 6870 /* Allow QUIT within unwind-protect routines, but defer any | |
| 6871 existing QUIT until afterwards. Only do this, however, for | |
| 6872 unwind-protects established by Lisp code, not by C code | |
| 6873 (e.g. free_opaque_ptr() or something), because the act of | |
| 6874 checking for QUIT can cause all sorts of weird things to | |
| 6875 happen, since it churns the event loop -- redisplay, running | |
| 6876 Lisp, etc. Code should not have to worry about this just | |
| 6877 because of establishing an unwind-protect. */ | |
| 6878 check_quit (); /* make Vquit_flag accurate */ | |
| 6879 oquit = Vquit_flag; | |
| 6880 Vquit_flag = Qnil; | |
| 6881 } | |
| 6882 | |
| 428 | 6883 --specpdl_ptr; |
| 6884 --specpdl_depth_counter; | |
| 6885 | |
| 1313 | 6886 /* #### At this point, there is no GC protection on old_value. This |
| 6887 could be a real problem, depending on what unwind-protect function | |
| 6888 is called. It looks like it just so happens that the ones | |
| 6889 actually called don't have a problem with this, e.g. Fprogn. But | |
| 6890 we should look into fixing this. (Many unwind-protect functions | |
| 6891 free values. Is it a problem if freed values are | |
| 6892 GC-protected?) */ | |
| 428 | 6893 if (specpdl_ptr->func != 0) |
| 1313 | 6894 { |
| 6895 /* An unwind-protect */ | |
| 6896 (*specpdl_ptr->func) (specpdl_ptr->old_value); | |
| 6897 } | |
| 6898 | |
| 428 | 6899 else |
| 6900 { | |
| 6901 /* We checked symbol for validity when we specbound it, | |
| 6902 so only need to call Fset if symbol has magic value. */ | |
| 440 | 6903 Lisp_Symbol *sym = XSYMBOL (specpdl_ptr->symbol); |
| 428 | 6904 if (!SYMBOL_VALUE_MAGIC_P (sym->value)) |
| 6905 sym->value = specpdl_ptr->old_value; | |
| 6906 else | |
| 6907 Fset (specpdl_ptr->symbol, specpdl_ptr->old_value); | |
| 6908 } | |
| 6909 | |
| 6910 #if 0 /* martin */ | |
| 6911 #ifndef EXCEEDINGLY_QUESTIONABLE_CODE | |
| 6912 /* There should never be anything here for us to remove. | |
| 6913 If so, it indicates a logic error in Emacs. Catches | |
| 6914 should get removed when a throw or signal occurs, or | |
| 6915 when a catch or condition-case exits normally. But | |
| 6916 it's too dangerous to just remove this code. --ben */ | |
| 6917 | |
| 6918 /* Furthermore, this code is not in FSFmacs!!! | |
| 6919 Braino on mly's part? */ | |
| 6920 /* If we're unwound past the pdlcount of a catch frame, | |
| 6921 that catch can't possibly still be valid. */ | |
| 6922 while (catchlist && catchlist->pdlcount > specpdl_depth_counter) | |
| 6923 { | |
| 6924 catchlist = catchlist->next; | |
| 6925 /* Don't mess with gcprolist, backtrace_list here */ | |
| 6926 } | |
| 6927 #endif | |
| 6928 #endif | |
| 1313 | 6929 |
| 6930 if (!UNBOUNDP (oquit)) | |
| 6931 Vquit_flag = oquit; | |
| 428 | 6932 } |
| 853 | 6933 check_specbind_stack_sanity (); |
| 428 | 6934 } |
| 6935 | |
| 6936 | |
| 6937 | |
| 6938 /* Get the value of symbol's global binding, even if that binding is | |
| 6939 not now dynamically visible. May return Qunbound or magic values. */ | |
| 6940 | |
| 6941 Lisp_Object | |
| 6942 top_level_value (Lisp_Object symbol) | |
| 6943 { | |
| 6944 REGISTER struct specbinding *ptr = specpdl; | |
| 6945 | |
| 6946 CHECK_SYMBOL (symbol); | |
| 6947 for (; ptr != specpdl_ptr; ptr++) | |
| 6948 { | |
| 6949 if (EQ (ptr->symbol, symbol)) | |
| 6950 return ptr->old_value; | |
| 6951 } | |
| 6952 return XSYMBOL (symbol)->value; | |
| 6953 } | |
| 6954 | |
| 6955 #if 0 | |
| 6956 | |
| 6957 Lisp_Object | |
| 6958 top_level_set (Lisp_Object symbol, Lisp_Object newval) | |
| 6959 { | |
| 6960 REGISTER struct specbinding *ptr = specpdl; | |
| 6961 | |
| 6962 CHECK_SYMBOL (symbol); | |
| 6963 for (; ptr != specpdl_ptr; ptr++) | |
| 6964 { | |
| 6965 if (EQ (ptr->symbol, symbol)) | |
| 6966 { | |
| 6967 ptr->old_value = newval; | |
| 6968 return newval; | |
| 6969 } | |
| 6970 } | |
| 6971 return Fset (symbol, newval); | |
| 6972 } | |
| 6973 | |
| 6974 #endif /* 0 */ | |
| 6975 | |
| 6976 | |
| 6977 /************************************************************************/ | |
| 6978 /* Backtraces */ | |
| 6979 /************************************************************************/ | |
| 6980 | |
| 6981 DEFUN ("backtrace-debug", Fbacktrace_debug, 2, 2, 0, /* | |
| 6982 Set the debug-on-exit flag of eval frame LEVEL levels down to FLAG. | |
| 6983 The debugger is entered when that frame exits, if the flag is non-nil. | |
| 6984 */ | |
| 6985 (level, flag)) | |
| 6986 { | |
| 6987 REGISTER struct backtrace *backlist = backtrace_list; | |
| 6988 REGISTER int i; | |
| 6989 | |
| 6990 CHECK_INT (level); | |
| 6991 | |
| 6992 for (i = 0; backlist && i < XINT (level); i++) | |
| 6993 { | |
| 6994 backlist = backlist->next; | |
| 6995 } | |
| 6996 | |
| 6997 if (backlist) | |
| 6998 backlist->debug_on_exit = !NILP (flag); | |
| 6999 | |
| 7000 return flag; | |
| 7001 } | |
| 7002 | |
| 7003 static void | |
| 7004 backtrace_specials (int speccount, int speclimit, Lisp_Object stream) | |
| 7005 { | |
| 7006 int printing_bindings = 0; | |
| 7007 | |
| 7008 for (; speccount > speclimit; speccount--) | |
| 7009 { | |
| 7010 if (specpdl[speccount - 1].func == 0 | |
| 7011 || specpdl[speccount - 1].func == specbind_unwind_local | |
| 7012 || specpdl[speccount - 1].func == specbind_unwind_wasnt_local) | |
| 7013 { | |
| 826 | 7014 write_c_string (stream, !printing_bindings ? " # bind (" : " "); |
| 428 | 7015 Fprin1 (specpdl[speccount - 1].symbol, stream); |
| 7016 printing_bindings = 1; | |
| 7017 } | |
| 7018 else | |
| 7019 { | |
| 826 | 7020 if (printing_bindings) write_c_string (stream, ")\n"); |
| 7021 write_c_string (stream, " # (unwind-protect ...)\n"); | |
| 428 | 7022 printing_bindings = 0; |
| 7023 } | |
| 7024 } | |
| 826 | 7025 if (printing_bindings) write_c_string (stream, ")\n"); |
| 428 | 7026 } |
| 7027 | |
| 1292 | 7028 static Lisp_Object |
| 7029 backtrace_unevalled_args (Lisp_Object *args) | |
| 7030 { | |
| 7031 if (args) | |
| 7032 return *args; | |
| 7033 else | |
| 7034 return list1 (build_string ("[internal]")); | |
| 7035 } | |
| 7036 | |
| 428 | 7037 DEFUN ("backtrace", Fbacktrace, 0, 2, "", /* |
| 7038 Print a trace of Lisp function calls currently active. | |
| 438 | 7039 Optional arg STREAM specifies the output stream to send the backtrace to, |
| 444 | 7040 and defaults to the value of `standard-output'. |
| 7041 Optional second arg DETAILED non-nil means show places where currently | |
| 7042 active variable bindings, catches, condition-cases, and | |
| 7043 unwind-protects, as well as function calls, were made. | |
| 428 | 7044 */ |
| 7045 (stream, detailed)) | |
| 7046 { | |
| 7047 /* This function can GC */ | |
| 7048 struct backtrace *backlist = backtrace_list; | |
| 7049 struct catchtag *catches = catchlist; | |
| 7050 int speccount = specpdl_depth(); | |
| 7051 | |
| 7052 int old_nl = print_escape_newlines; | |
| 7053 int old_pr = print_readably; | |
| 7054 Lisp_Object old_level = Vprint_level; | |
| 7055 Lisp_Object oiq = Vinhibit_quit; | |
| 7056 struct gcpro gcpro1, gcpro2; | |
| 7057 | |
| 7058 /* We can't allow quits in here because that could cause the values | |
| 7059 of print_readably and print_escape_newlines to get screwed up. | |
| 7060 Normally we would use a record_unwind_protect but that would | |
| 7061 screw up the functioning of this function. */ | |
| 7062 Vinhibit_quit = Qt; | |
| 7063 | |
| 7064 entering_debugger = 0; | |
| 7065 | |
| 872 | 7066 if (!NILP (detailed)) |
| 7067 Vprint_level = make_int (50); | |
| 7068 else | |
| 7069 Vprint_level = make_int (3); | |
| 428 | 7070 print_readably = 0; |
| 7071 print_escape_newlines = 1; | |
| 7072 | |
| 7073 GCPRO2 (stream, old_level); | |
| 7074 | |
| 1261 | 7075 stream = canonicalize_printcharfun (stream); |
| 428 | 7076 |
| 7077 for (;;) | |
| 7078 { | |
| 7079 if (!NILP (detailed) && catches && catches->backlist == backlist) | |
| 7080 { | |
| 7081 int catchpdl = catches->pdlcount; | |
| 438 | 7082 if (speccount > catchpdl |
| 7083 && specpdl[catchpdl].func == condition_case_unwind) | |
| 428 | 7084 /* This is a condition-case catchpoint */ |
| 7085 catchpdl = catchpdl + 1; | |
| 7086 | |
| 7087 backtrace_specials (speccount, catchpdl, stream); | |
| 7088 | |
| 7089 speccount = catches->pdlcount; | |
| 7090 if (catchpdl == speccount) | |
| 7091 { | |
| 826 | 7092 write_c_string (stream, " # (catch "); |
| 428 | 7093 Fprin1 (catches->tag, stream); |
| 826 | 7094 write_c_string (stream, " ...)\n"); |
| 428 | 7095 } |
| 7096 else | |
| 7097 { | |
| 826 | 7098 write_c_string (stream, " # (condition-case ... . "); |
| 428 | 7099 Fprin1 (Fcdr (Fcar (catches->tag)), stream); |
| 826 | 7100 write_c_string (stream, ")\n"); |
| 428 | 7101 } |
| 7102 catches = catches->next; | |
| 7103 } | |
| 7104 else if (!backlist) | |
| 7105 break; | |
| 7106 else | |
| 7107 { | |
| 7108 if (!NILP (detailed) && backlist->pdlcount < speccount) | |
| 7109 { | |
| 7110 backtrace_specials (speccount, backlist->pdlcount, stream); | |
| 7111 speccount = backlist->pdlcount; | |
| 7112 } | |
| 826 | 7113 write_c_string (stream, backlist->debug_on_exit ? "* " : " "); |
| 428 | 7114 if (backlist->nargs == UNEVALLED) |
| 7115 { | |
| 1292 | 7116 Fprin1 (Fcons (*backlist->function, |
| 7117 backtrace_unevalled_args (backlist->args)), | |
| 7118 stream); | |
| 826 | 7119 write_c_string (stream, "\n"); /* from FSFmacs 19.30 */ |
| 428 | 7120 } |
| 7121 else | |
| 7122 { | |
| 7123 Lisp_Object tem = *backlist->function; | |
| 7124 Fprin1 (tem, stream); /* This can QUIT */ | |
| 826 | 7125 write_c_string (stream, "("); |
| 428 | 7126 if (backlist->nargs == MANY) |
| 7127 { | |
| 7128 int i; | |
| 7129 Lisp_Object tail = Qnil; | |
| 7130 struct gcpro ngcpro1; | |
| 7131 | |
| 7132 NGCPRO1 (tail); | |
| 7133 for (tail = *backlist->args, i = 0; | |
| 7134 !NILP (tail); | |
| 7135 tail = Fcdr (tail), i++) | |
| 7136 { | |
| 826 | 7137 if (i != 0) write_c_string (stream, " "); |
| 428 | 7138 Fprin1 (Fcar (tail), stream); |
| 7139 } | |
| 7140 NUNGCPRO; | |
| 7141 } | |
| 7142 else | |
| 7143 { | |
| 7144 int i; | |
| 7145 for (i = 0; i < backlist->nargs; i++) | |
| 7146 { | |
| 826 | 7147 if (!i && EQ (tem, Qbyte_code)) |
| 7148 { | |
| 7149 write_c_string (stream, "\"...\""); | |
| 7150 continue; | |
| 7151 } | |
| 7152 if (i != 0) write_c_string (stream, " "); | |
| 428 | 7153 Fprin1 (backlist->args[i], stream); |
| 7154 } | |
| 7155 } | |
| 826 | 7156 write_c_string (stream, ")\n"); |
| 428 | 7157 } |
| 7158 backlist = backlist->next; | |
| 7159 } | |
| 7160 } | |
| 7161 Vprint_level = old_level; | |
| 7162 print_readably = old_pr; | |
| 7163 print_escape_newlines = old_nl; | |
| 7164 UNGCPRO; | |
| 7165 Vinhibit_quit = oiq; | |
| 7166 return Qnil; | |
| 7167 } | |
| 7168 | |
| 7169 | |
| 444 | 7170 DEFUN ("backtrace-frame", Fbacktrace_frame, 1, 1, 0, /* |
| 7171 Return the function and arguments NFRAMES up from current execution point. | |
| 428 | 7172 If that frame has not evaluated the arguments yet (or is a special form), |
| 7173 the value is (nil FUNCTION ARG-FORMS...). | |
| 7174 If that frame has evaluated its arguments and called its function already, | |
| 7175 the value is (t FUNCTION ARG-VALUES...). | |
| 7176 A &rest arg is represented as the tail of the list ARG-VALUES. | |
| 7177 FUNCTION is whatever was supplied as car of evaluated list, | |
| 7178 or a lambda expression for macro calls. | |
| 444 | 7179 If NFRAMES is more than the number of frames, the value is nil. |
| 428 | 7180 */ |
| 7181 (nframes)) | |
| 7182 { | |
| 7183 REGISTER struct backtrace *backlist = backtrace_list; | |
| 7184 REGISTER int i; | |
| 7185 Lisp_Object tem; | |
| 7186 | |
| 7187 CHECK_NATNUM (nframes); | |
| 7188 | |
| 7189 /* Find the frame requested. */ | |
| 7190 for (i = XINT (nframes); backlist && (i-- > 0);) | |
| 7191 backlist = backlist->next; | |
| 7192 | |
| 7193 if (!backlist) | |
| 7194 return Qnil; | |
| 7195 if (backlist->nargs == UNEVALLED) | |
| 1292 | 7196 return Fcons (Qnil, Fcons (*backlist->function, |
| 7197 backtrace_unevalled_args (backlist->args))); | |
| 428 | 7198 else |
| 7199 { | |
| 7200 if (backlist->nargs == MANY) | |
| 7201 tem = *backlist->args; | |
| 7202 else | |
| 7203 tem = Flist (backlist->nargs, backlist->args); | |
| 7204 | |
| 7205 return Fcons (Qt, Fcons (*backlist->function, tem)); | |
| 7206 } | |
| 7207 } | |
| 7208 | |
| 7209 | |
| 7210 /************************************************************************/ | |
| 7211 /* Warnings */ | |
| 7212 /************************************************************************/ | |
| 7213 | |
| 1123 | 7214 static int |
| 7215 warning_will_be_discarded (Lisp_Object level) | |
| 7216 { | |
| 7217 /* Don't even generate debug warnings if they're going to be discarded, | |
| 7218 to avoid excessive consing. */ | |
| 7219 return (EQ (level, Qdebug) && !NILP (Vlog_warning_minimum_level) && | |
| 7220 !EQ (Vlog_warning_minimum_level, Qdebug)); | |
| 7221 } | |
| 7222 | |
| 428 | 7223 void |
| 1204 | 7224 warn_when_safe_lispobj (Lisp_Object class_, Lisp_Object level, |
| 428 | 7225 Lisp_Object obj) |
| 7226 { | |
| 1123 | 7227 if (warning_will_be_discarded (level)) |
| 793 | 7228 return; |
| 1123 | 7229 |
| 1204 | 7230 obj = list1 (list3 (class_, level, obj)); |
| 428 | 7231 if (NILP (Vpending_warnings)) |
| 7232 Vpending_warnings = Vpending_warnings_tail = obj; | |
| 7233 else | |
| 7234 { | |
| 7235 Fsetcdr (Vpending_warnings_tail, obj); | |
| 7236 Vpending_warnings_tail = obj; | |
| 7237 } | |
| 7238 } | |
| 7239 | |
| 7240 /* #### This should probably accept Lisp objects; but then we have | |
| 7241 to make sure that Feval() isn't called, since it might not be safe. | |
| 7242 | |
| 7243 An alternative approach is to just pass some non-string type of | |
| 7244 Lisp_Object to warn_when_safe_lispobj(); `prin1-to-string' will | |
| 7245 automatically be called when it is safe to do so. */ | |
| 7246 | |
| 7247 void | |
| 1204 | 7248 warn_when_safe (Lisp_Object class_, Lisp_Object level, const CIbyte *fmt, ...) |
| 428 | 7249 { |
| 7250 Lisp_Object obj; | |
| 7251 va_list args; | |
| 7252 | |
| 1123 | 7253 if (warning_will_be_discarded (level)) |
| 793 | 7254 return; |
| 1123 | 7255 |
| 428 | 7256 va_start (args, fmt); |
| 771 | 7257 obj = emacs_vsprintf_string (CGETTEXT (fmt), args); |
| 428 | 7258 va_end (args); |
| 7259 | |
| 1204 | 7260 warn_when_safe_lispobj (class_, level, obj); |
| 428 | 7261 } |
| 7262 | |
| 7263 | |
| 7264 | |
| 7265 | |
| 7266 /************************************************************************/ | |
| 7267 /* Initialization */ | |
| 7268 /************************************************************************/ | |
| 7269 | |
| 7270 void | |
| 7271 syms_of_eval (void) | |
| 7272 { | |
| 442 | 7273 INIT_LRECORD_IMPLEMENTATION (subr); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7274 INIT_LRECORD_IMPLEMENTATION (multiple_value); |
| 442 | 7275 |
| 563 | 7276 DEFSYMBOL (Qinhibit_quit); |
| 7277 DEFSYMBOL (Qautoload); | |
| 7278 DEFSYMBOL (Qdebug_on_error); | |
| 7279 DEFSYMBOL (Qstack_trace_on_error); | |
| 7280 DEFSYMBOL (Qdebug_on_signal); | |
| 7281 DEFSYMBOL (Qstack_trace_on_signal); | |
| 7282 DEFSYMBOL (Qdebugger); | |
| 7283 DEFSYMBOL (Qmacro); | |
| 428 | 7284 defsymbol (&Qand_rest, "&rest"); |
| 7285 defsymbol (&Qand_optional, "&optional"); | |
| 7286 /* Note that the process code also uses Qexit */ | |
| 563 | 7287 DEFSYMBOL (Qexit); |
| 7288 DEFSYMBOL (Qsetq); | |
| 7289 DEFSYMBOL (Qinteractive); | |
| 7290 DEFSYMBOL (Qcommandp); | |
| 7291 DEFSYMBOL (Qdefun); | |
| 7292 DEFSYMBOL (Qprogn); | |
| 7293 DEFSYMBOL (Qvalues); | |
| 7294 DEFSYMBOL (Qdisplay_warning); | |
| 7295 DEFSYMBOL (Qrun_hooks); | |
| 887 | 7296 DEFSYMBOL (Qfinalize_list); |
| 563 | 7297 DEFSYMBOL (Qif); |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7298 DEFSYMBOL (Qthrow); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7299 DEFSYMBOL (Qobsolete_throw); |
|
4686
cdabd56ce1b5
Fix various small issues with the multiple-value implementation.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4677
diff
changeset
|
7300 DEFSYMBOL (Qmultiple_value_list_internal); |
| 428 | 7301 |
| 7302 DEFSUBR (For); | |
| 7303 DEFSUBR (Fand); | |
| 7304 DEFSUBR (Fif); | |
| 7305 DEFSUBR_MACRO (Fwhen); | |
| 7306 DEFSUBR_MACRO (Funless); | |
| 7307 DEFSUBR (Fcond); | |
| 7308 DEFSUBR (Fprogn); | |
| 7309 DEFSUBR (Fprog1); | |
| 7310 DEFSUBR (Fprog2); | |
| 7311 DEFSUBR (Fsetq); | |
| 7312 DEFSUBR (Fquote); | |
|
4744
17f7e9191c0b
Rationalise duplicated functionality, #'custom-quote, #'quote-maybe.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4693
diff
changeset
|
7313 DEFSUBR (Fquote_maybe); |
| 428 | 7314 DEFSUBR (Ffunction); |
| 7315 DEFSUBR (Fdefun); | |
| 7316 DEFSUBR (Fdefmacro); | |
| 7317 DEFSUBR (Fdefvar); | |
| 7318 DEFSUBR (Fdefconst); | |
| 7319 DEFSUBR (Flet); | |
| 7320 DEFSUBR (FletX); | |
| 7321 DEFSUBR (Fwhile); | |
| 7322 DEFSUBR (Fmacroexpand_internal); | |
| 7323 DEFSUBR (Fcatch); | |
| 7324 DEFSUBR (Fthrow); | |
| 7325 DEFSUBR (Funwind_protect); | |
| 7326 DEFSUBR (Fcondition_case); | |
| 7327 DEFSUBR (Fcall_with_condition_handler); | |
| 7328 DEFSUBR (Fsignal); | |
| 7329 DEFSUBR (Finteractive_p); | |
| 7330 DEFSUBR (Fcommandp); | |
| 7331 DEFSUBR (Fcommand_execute); | |
| 7332 DEFSUBR (Fautoload); | |
| 7333 DEFSUBR (Feval); | |
| 7334 DEFSUBR (Fapply); | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7335 DEFSUBR (Fmultiple_value_call); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7336 DEFSUBR (Fmultiple_value_list_internal); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7337 DEFSUBR (Fmultiple_value_prog1); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7338 DEFSUBR (Fvalues); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7339 DEFSUBR (Fvalues_list); |
| 428 | 7340 DEFSUBR (Ffuncall); |
| 7341 DEFSUBR (Ffunctionp); | |
| 7342 DEFSUBR (Ffunction_min_args); | |
| 7343 DEFSUBR (Ffunction_max_args); | |
| 7344 DEFSUBR (Frun_hooks); | |
| 7345 DEFSUBR (Frun_hook_with_args); | |
| 7346 DEFSUBR (Frun_hook_with_args_until_success); | |
| 7347 DEFSUBR (Frun_hook_with_args_until_failure); | |
| 7348 DEFSUBR (Fbacktrace_debug); | |
| 7349 DEFSUBR (Fbacktrace); | |
| 7350 DEFSUBR (Fbacktrace_frame); | |
| 7351 } | |
| 7352 | |
| 7353 void | |
| 814 | 7354 init_eval_semi_early (void) |
| 428 | 7355 { |
| 7356 specpdl_ptr = specpdl; | |
| 7357 specpdl_depth_counter = 0; | |
| 7358 catchlist = 0; | |
| 7359 Vcondition_handlers = Qnil; | |
| 7360 backtrace_list = 0; | |
| 7361 Vquit_flag = Qnil; | |
| 7362 debug_on_next_call = 0; | |
| 7363 lisp_eval_depth = 0; | |
| 7364 entering_debugger = 0; | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7365 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7366 first_desired_multiple_value = 0; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7367 multiple_value_current_limit = 1; |
| 428 | 7368 } |
| 7369 | |
| 7370 void | |
| 7371 reinit_vars_of_eval (void) | |
| 7372 { | |
| 7373 preparing_for_armageddon = 0; | |
| 7374 in_warnings = 0; | |
| 7375 specpdl_size = 50; | |
| 7376 specpdl = xnew_array (struct specbinding, specpdl_size); | |
| 7377 /* XEmacs change: increase these values. */ | |
| 7378 max_specpdl_size = 3000; | |
| 442 | 7379 max_lisp_eval_depth = 1000; |
| 7380 #ifdef DEFEND_AGAINST_THROW_RECURSION | |
| 428 | 7381 throw_level = 0; |
| 7382 #endif | |
| 2367 | 7383 init_eval_semi_early (); |
| 428 | 7384 } |
| 7385 | |
| 7386 void | |
| 7387 vars_of_eval (void) | |
| 7388 { | |
| 7389 DEFVAR_INT ("max-specpdl-size", &max_specpdl_size /* | |
| 7390 Limit on number of Lisp variable bindings & unwind-protects before error. | |
| 7391 */ ); | |
| 7392 | |
| 7393 DEFVAR_INT ("max-lisp-eval-depth", &max_lisp_eval_depth /* | |
| 7394 Limit on depth in `eval', `apply' and `funcall' before error. | |
| 7395 This limit is to catch infinite recursions for you before they cause | |
| 7396 actual stack overflow in C, which would be fatal for Emacs. | |
| 7397 You can safely make it considerably larger than its default value, | |
| 7398 if that proves inconveniently small. | |
| 7399 */ ); | |
| 7400 | |
| 7401 DEFVAR_LISP ("quit-flag", &Vquit_flag /* | |
| 853 | 7402 t causes running Lisp code to abort, unless `inhibit-quit' is non-nil. |
| 7403 `critical' causes running Lisp code to abort regardless of `inhibit-quit'. | |
| 7404 Normally, you do not need to set this value yourself. It is set to | |
| 7405 t each time a Control-G is detected, and to `critical' each time a | |
| 7406 Shift-Control-G is detected. The XEmacs core C code is littered with | |
| 7407 calls to the QUIT; macro, which check the values of `quit-flag' and | |
| 2500 | 7408 `inhibit-quit' and ABORT (or more accurately, call (signal 'quit)) if |
| 853 | 7409 it's correct to do so. |
| 428 | 7410 */ ); |
| 7411 Vquit_flag = Qnil; | |
| 7412 | |
| 7413 DEFVAR_LISP ("inhibit-quit", &Vinhibit_quit /* | |
| 7414 Non-nil inhibits C-g quitting from happening immediately. | |
| 7415 Note that `quit-flag' will still be set by typing C-g, | |
| 7416 so a quit will be signalled as soon as `inhibit-quit' is nil. | |
| 7417 To prevent this happening, set `quit-flag' to nil | |
| 853 | 7418 before making `inhibit-quit' nil. |
| 7419 | |
| 7420 The value of `inhibit-quit' is ignored if a critical quit is | |
| 7421 requested by typing control-shift-G in a window-system frame; | |
| 7422 this is explained in more detail in `quit-flag'. | |
| 428 | 7423 */ ); |
| 7424 Vinhibit_quit = Qnil; | |
| 7425 | |
| 7426 DEFVAR_LISP ("stack-trace-on-error", &Vstack_trace_on_error /* | |
| 7427 *Non-nil means automatically display a backtrace buffer | |
| 7428 after any error that is not handled by a `condition-case'. | |
| 7429 If the value is a list, an error only means to display a backtrace | |
| 7430 if one of its condition symbols appears in the list. | |
| 7431 See also variable `stack-trace-on-signal'. | |
| 7432 */ ); | |
| 7433 Vstack_trace_on_error = Qnil; | |
| 7434 | |
| 7435 DEFVAR_LISP ("stack-trace-on-signal", &Vstack_trace_on_signal /* | |
| 7436 *Non-nil means automatically display a backtrace buffer | |
| 7437 after any error that is signalled, whether or not it is handled by | |
| 7438 a `condition-case'. | |
| 7439 If the value is a list, an error only means to display a backtrace | |
| 7440 if one of its condition symbols appears in the list. | |
| 7441 See also variable `stack-trace-on-error'. | |
| 7442 */ ); | |
| 7443 Vstack_trace_on_signal = Qnil; | |
| 7444 | |
| 7445 DEFVAR_LISP ("debug-ignored-errors", &Vdebug_ignored_errors /* | |
| 7446 *List of errors for which the debugger should not be called. | |
| 7447 Each element may be a condition-name or a regexp that matches error messages. | |
| 7448 If any element applies to a given error, that error skips the debugger | |
| 7449 and just returns to top level. | |
| 7450 This overrides the variable `debug-on-error'. | |
| 7451 It does not apply to errors handled by `condition-case'. | |
| 7452 */ ); | |
| 7453 Vdebug_ignored_errors = Qnil; | |
| 7454 | |
| 7455 DEFVAR_LISP ("debug-on-error", &Vdebug_on_error /* | |
| 7456 *Non-nil means enter debugger if an unhandled error is signalled. | |
| 7457 The debugger will not be entered if the error is handled by | |
| 7458 a `condition-case'. | |
| 7459 If the value is a list, an error only means to enter the debugger | |
| 7460 if one of its condition symbols appears in the list. | |
| 7461 This variable is overridden by `debug-ignored-errors'. | |
| 7462 See also variables `debug-on-quit' and `debug-on-signal'. | |
| 1123 | 7463 |
|
4657
f8d7d8202635
imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7464 Process filters are considered to be outside of condition-case forms |
|
f8d7d8202635
imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7465 (unless contained in the process filter itself). To prevent the |
|
f8d7d8202635
imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7466 debugger from being called from a process filter, use a list value, or |
|
f8d7d8202635
imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7467 put the expected error\(s) in `debug-ignored-errors'. |
|
f8d7d8202635
imported patch accept-process-output-docstring
Stephen J. Turnbull <stephen@xemacs.org>
parents:
4642
diff
changeset
|
7468 |
| 1123 | 7469 If this variable is set while XEmacs is running noninteractively (using |
| 7470 `-batch'), and XEmacs was configured with `--debug' (#define XEMACS_DEBUG | |
| 7471 in the C code), instead of trying to invoke the Lisp debugger (which | |
| 7472 obviously won't work), XEmacs will break out to a C debugger using | |
| 7473 \(force-debugging-signal t). This is useful because debugging | |
| 7474 noninteractive runs of XEmacs is often very difficult, since they typically | |
| 7475 happen as part of sometimes large and complex make suites (e.g. rebuilding | |
| 2500 | 7476 the XEmacs packages). NOTE: This runs ABORT()!!! (As well as and after |
| 1123 | 7477 executing INT 3 under MS Windows, which should invoke a debugger if it's |
| 7478 active.) This is guaranteed to kill XEmacs! (But in this situation, XEmacs | |
| 7479 is about to die anyway, and if no debugger is present, this will usefully | |
| 7480 dump core.) The most useful way to set this flag when debugging | |
| 7481 noninteractive runs, especially in makefiles, is using the environment | |
| 7482 variable XEMACSDEBUG, like this: | |
| 771 | 7483 |
| 7484 \(using csh) setenv XEMACSDEBUG '(setq debug-on-error t)' | |
| 7485 \(using bash) export XEMACSDEBUG='(setq debug-on-error t)' | |
| 428 | 7486 */ ); |
| 7487 Vdebug_on_error = Qnil; | |
| 7488 | |
| 7489 DEFVAR_LISP ("debug-on-signal", &Vdebug_on_signal /* | |
| 7490 *Non-nil means enter debugger if an error is signalled. | |
| 7491 The debugger will be entered whether or not the error is handled by | |
| 7492 a `condition-case'. | |
| 7493 If the value is a list, an error only means to enter the debugger | |
| 7494 if one of its condition symbols appears in the list. | |
| 7495 See also variable `debug-on-quit'. | |
| 1123 | 7496 |
| 7497 This will attempt to enter a C debugger when XEmacs is run noninteractively | |
| 7498 and under the same conditions as described in `debug-on-error'. | |
| 428 | 7499 */ ); |
| 7500 Vdebug_on_signal = Qnil; | |
| 7501 | |
| 7502 DEFVAR_BOOL ("debug-on-quit", &debug_on_quit /* | |
| 7503 *Non-nil means enter debugger if quit is signalled (C-G, for example). | |
| 7504 Does not apply if quit is handled by a `condition-case'. Entering the | |
| 7505 debugger can also be achieved at any time (for X11 console) by typing | |
| 7506 control-shift-G to signal a critical quit. | |
| 7507 */ ); | |
| 7508 debug_on_quit = 0; | |
| 7509 | |
| 7510 DEFVAR_BOOL ("debug-on-next-call", &debug_on_next_call /* | |
| 7511 Non-nil means enter debugger before next `eval', `apply' or `funcall'. | |
| 7512 */ ); | |
| 7513 | |
| 1292 | 7514 DEFVAR_BOOL ("backtrace-with-interal-sections", |
| 7515 &backtrace_with_internal_sections /* | |
| 7516 Non-nil means backtraces will contain additional information indicating | |
| 7517 when particular sections of the C code have been entered, e.g. redisplay(), | |
| 7518 byte-char conversion, internal-external conversion, etc. This can be | |
| 7519 particularly useful when XEmacs crashes, in helping to pinpoint the problem. | |
| 7520 */ ); | |
| 7521 #ifdef ERROR_CHECK_STRUCTURES | |
| 7522 backtrace_with_internal_sections = 1; | |
| 7523 #else | |
| 7524 backtrace_with_internal_sections = 0; | |
| 7525 #endif | |
| 7526 | |
| 428 | 7527 DEFVAR_LISP ("debugger", &Vdebugger /* |
| 7528 Function to call to invoke debugger. | |
| 7529 If due to frame exit, args are `exit' and the value being returned; | |
| 7530 this function's value will be returned instead of that. | |
| 7531 If due to error, args are `error' and a list of the args to `signal'. | |
| 7532 If due to `apply' or `funcall' entry, one arg, `lambda'. | |
| 7533 If due to `eval' entry, one arg, t. | |
| 7534 */ ); | |
| 7535 Vdebugger = Qnil; | |
| 7536 | |
|
4677
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7537 DEFVAR_CONST_INT ("multiple-values-limit", &Vmultiple_values_limit /* |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7538 The exclusive upper bound on the number of multiple values. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7539 |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7540 This applies to `values', `values-list', `multiple-value-bind' and related |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7541 macros and special forms. |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7542 */); |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7543 Vmultiple_values_limit = EMACS_INT_MAX > INT_MAX ? INT_MAX : EMACS_INT_MAX; |
|
8f1ee2d15784
Support full Common Lisp multiple values in C.
Aidan Kehoe <kehoea@parhasard.net>
parents:
4657
diff
changeset
|
7544 |
| 853 | 7545 staticpro (&Vcatch_everything_tag); |
| 7546 Vcatch_everything_tag = make_opaque (OPAQUE_CLEAR, 0); | |
| 7547 | |
| 428 | 7548 staticpro (&Vpending_warnings); |
| 7549 Vpending_warnings = Qnil; | |
| 1204 | 7550 dump_add_root_lisp_object (&Vpending_warnings_tail); |
| 428 | 7551 Vpending_warnings_tail = Qnil; |
| 7552 | |
| 793 | 7553 DEFVAR_LISP ("log-warning-minimum-level", &Vlog_warning_minimum_level); |
| 7554 Vlog_warning_minimum_level = Qinfo; | |
| 7555 | |
| 428 | 7556 staticpro (&Vautoload_queue); |
| 7557 Vautoload_queue = Qnil; | |
| 7558 | |
| 7559 staticpro (&Vcondition_handlers); | |
| 7560 | |
| 853 | 7561 staticpro (&Vdeletable_permanent_display_objects); |
| 7562 Vdeletable_permanent_display_objects = Qnil; | |
| 7563 | |
| 7564 staticpro (&Vmodifiable_buffers); | |
| 7565 Vmodifiable_buffers = Qnil; | |
| 7566 | |
| 7567 inhibit_flags = 0; | |
| 7568 } |